$30,000 Millionaire said:
There are people in this thread that would tell you to live in a trailer and eat ramen until you paid off all of your debt, and then you could begin to live.
As long as you're not deficit spending and you're saving sufficiently for retirement, do what you want.
Life is about a lot more than just net worth.
This is the advice that is the most helpful, because it's true.
I still have student loan debt and have somehow been able to buy 3 different houses, buy and pay off 4 cars, get married, travel, and have 3 kids with tons of activities, and am still save for retirement.
When I hit my 40s, it occurred to me that I have been out of college for almost 20 years, and coupled with some people I went to HS with passing, it really hit me about how short life really is, because those ~20 years went by in a flash. Maybe it's my mid-life crisis or something…I dunno.
Every since then, I've loosened up a bit with money and will spend on things I wouldn't have 5 years ago. As $30k said, life is more than net worth. I can honestly say I'm a lot happier because I don't stress about squeezing out every nickel I can for a future I may not get.
As to your particular situation, I would get the remodel. You'll get to enjoy the kitchen for longer. It's an improvement on the biggest asset you have, and if you have a life change that makes you put the house on the market, you'll get more for it as well.
If you're still in doubt, talk to friends and relatives who have done remodels on their homes. I guarantee you'll hear "I wish we'd have done it sooner" rather than "I'm glad we waited."
This is all assuming the $50k isn't your entire savings and you still have a nest egg for emergencies on top of your retirement.