Ironically, I came over to this board to ask a similar question.
My experience in trying to buy vacant land over the past 17 years has been this:
2005, I talked to a lender who wanted 20% down for a residential lot.
2018, I knew I needed 20% down for purchasing a residential acreage lot and had it in the bank. But, once the lender sent it to underwriting, they miraculously discovered that for a lot larger than 5 acres, they needed 40% down which I didn't have at that point.
Wound up getting the owner to finance a 3 year loan for the lot. Had to pay it off as part of the refinance of my primary residence in 2020. The owner was happy to get his money early.
I've got about 50% equity in my house and I'm trying to figure out if I'd want to tap into that with a HELOC to buy another property, or if there's a way I could put 10% or so down to purchase a vacant lot that I'd want to build on.
I feel like there might be some program for purchasing vacant land to build on if you're a Texas Veteran but I'm not totally sure about that.