I'm late to the game here. Just found this thread and read its entirety.
Some things to consider.
You should know and fully understand that my tag lines are as follows ....
"I am a slow learner with minimal retention."
"The information I provide you is worth slightly less than what you just paid for it."
-If the parents sell the property, there is likely a Long Term Capital Gain (LTCG) Tax due on the difference between the cost basis and the selling price. Selling a portion to your sister or the entire farm/ranch to someone else is going to likely initiate a tax obligation to your parents. Your parents will have that liability, and I doubt they want that, and I doubt your sister and BIL will help pay that portion of the tax obligation for your parents. If that cool old barn was depreciated over time and your sister wants it, an appraisal or line-itemed asset on the barn's value listed in a land sale from your parents to your sis and BIL would open another tax obligation to your parents. Depreciated asset less the salvage value less the selling price would likely generate a Capital Gain. Otherwise, sell the property with the barn on it to your sis and BIL, don't list the barn, and no obligation hits the radar.
-If the land is held to possibly help offset expense for your parents long term care (I agree with you on this from what i have discerned in the thread) as your parents enter long term care (assisted to hospice care) make an assessment at that time. If they run out of money, the healthcare facility may exchange their care for title to your parents farm/ranch. At this point in time, the economics depend on if parents think they have more expense of living going forward versus what the farm/ranch is worth - time to give it to the health care provider. Otherwise, the farm/ranch would be sold independently to help offset the healthcare expense, remember a LTCG is generated. .... and, the parents may outlive the proceeds generated from the sale. Sometimes it's better to let the healthcare facility "have it". (personally, i have a hard time with this one, giving the farm/ranch to the healthcare provider..) Also, if the parents want to go, or planning to go, the Medicaid route, that farm/ranch needs to be out of their name, years in advance.
-Trust - Parents should set up a Revocable Trust with father and mother as Settlor's (controllers). Whoever passes first, the Revocable Trust passes to remaining/surviving parent. After surviving passes, the Revocable Trust passes to an Irrevocable Trust to be managed by a Trustee or Co-Trustees (you & your sis). Make sure parents bank account(s) titles, life insurance beneficiaries, car titles, IRA's beneficiaries, are changed to reflect Revocable Trust. After sole surviving parent passes all assets will eventually flow into the Irrevocable Trust for you and sis to manage/sell/take etc. Get a Retro-Appraisal (appraisal showing value after death) of assets. Documents - have pre-made, to be signed later by you and sis, Trust forms showing that a pass-thru has taken place and you as Co-Trustees are authorize to do biz(POA) for Trust - attorney's will/should know what to provide for the continuance. Funds from sales of Trust assets will go to a Trust bank account. (Cash sales should go in your pocket :- )) ... ) You or sis will need to apply for an Employee Tax Identification Number for the Trust - That will be the Tax ID for the Irrevocable/Final Trust. As current assets(money) are distributed from Irrevocable Trust bank account to you and sis, K-1's will need to be generated from the Irrevocable Trust, you'll report those on your personal 1040's and the Irrevocable Trust will file a 1041 showing K-1 distributions until all assets are liquidated and funds distributed to the beneficiaries (you & sis). Note: If your parents change accounts titles and beneficiaries and such are executed and changed completely and the Irrevocable Trust portion states a 50/50 split to you and sis - you will not need to probate the Wills or Trust. Stay out of probate, if possible, IMO. Also, parents can insert language options in the Trust, like.... that any disagreement between beneficiaries on final disposition of any asset without resolve will be automatically given to (insert favorite charity here) without dispute and should dispute arise, that beneficiarie(s) will be entitled to $1.00 from the Trust and nothing more from the Trust and will be automatically removed as Co-Trustee. Moral to story, .... don't take a sinner to lunch, take them to church.
-Another consideration, a 1031 Exchange, you definitely will need an attorney, tax advisor and real estate help here. If your folks need to downside, have your sis & BIL buy a house equivalent to the value of the farm/ranch. Your parents would then exchange the farm/ranch for the sis & BIL house of like-kind value. No tax consequences on the trade. Later the house is available to sell for needed long term care funds. The tricky part is in the 1031 law, "sometimes" this is not allowed for a primary residence, and "sometimes" this is not allowed with large amounts of land to trade for a house, on and on, etc. However, I have friends on both sides of this 1031 Exchange equation, one not getting a deal done because of like-kind, yet a good friend of mine traded his 2,500 acre ranch in Bakersfield, CA for a beach house in Santa Barbara, CA...go figure. Remember, the law is not the law - the loophole is the law. Find the loophole or find a "good" attorney.
-Sounds like,....
*sis & BIL dont have 2 nickels to rub together.
*I think you are doing the right thing and seem to be fair minded about all of this.
*Don't be afraid to be bold and honest in discussion, with all party's present, in a mild conversational tone, sis is not afraid of being bold. This is not the time for you to take the High Road, take both lanes of the Middle Road. Call her out in a nice direct non-confrontational way. Also, you can always state, "Sister, it appears to me that....end with....help me understand or explain why I may be misinterpreting?" Sticking to that intro gives sis a chance to defend herself and come out with statements as to why they want to do what they are doing. If she doesn't explain, your "appears to be" statement is getting validated. Your Dad - he'll appreciate this even if he doesn't comment.
*Your mom,....it's inherent that the daughter(your sis) will be assumed to take care of the parents when they are old and in need of help. Just know, your mom is not wanting to destroy that relationship,...unless you step up and say you will be responsible/primary decision maker for them(your parents) as long as they are alive and after; however, your parents have to accept your offer for it to be valid. Sister has an advantage over you. I believe I read where you live away from parents. (I personally consider living away from someone to be in excess of a 4 hour drive. If you're within 4 hours, to me, it's no different than living in the same town. I look at a 300 mile drive no differently than a drive down the block and I am a bit different than most in this viewpoint.) Mom knows sis & BIL don't have 2 nickels, but mom may want daughter close by for long term events. If mom is thinking that, she should come clean to you,....but she won't. Witness this too many times where mom stays silent on the "daughter care hope" topic in many families. (Grandparents sold their farm to my uncle & aunt {in-law, not a daughter in this example}. Grandparents didn't give my dad or the other sibs a chance to buy. Grandparents said they sold the farm to uncle & aunt because uncle & aunt promise them long term care. After 1.5 years, Aunt declares it's too much work. Grandparents end up in long term healthcare facility on their own tab. Uncle & Aunt got the farm. It will make you spit, but hey, they both got what they wanted, right?)
EDIT: Find out if your sis has your parents Medical Power of Attorney. If sis has this document, she's more than a leg-up on you. This tidbit of info will help you verify a whole lot of thoughts in your mind and reality. The rest of the stuff falls into place thereafter and makes it easier to interpret the "Why".
I've short-cutted some to help offset the TL;DR (not really!), and there's likely some responses to come back to poke a hole in the tire, so to speak. I'll come back to fix the flat, so to speak(if I can).
schwack schwack, you definitely aren't alone in these situations. Blood is thicker than water, but I have never seen a thirsty person ask for a glass of blood, if you know what I mean. In person, show me a family with no issues and in 15 minutes, or less, I'll have that family admit an issue they never thought they had..