Sorry for your loss. I read parts of your other post and I wouldn't help out financially.
https://forum.mrmoneymustache.com/welcome-to-the-forum/question-for-you-real-estate-folks/Have him get HIS OWN MORTGAGE for the share he will still owe you on the house.
You said less than $50K. Get it appraised but lets assume 46K (Feel free to do a spread sheet with other numbers.)
If you two can agree on a price, maybe you can avoid appraisal fees.
46K + 28K = 74K divide by 2 so $37K cash for you.
He gets the house, & doesn't need to move, but still owes you 9K.
If a bank will not loan him 9K on a house valued at 46K why would you even consider it?
One problem may be that the amount is too small for a bank to consider as a mortgage. (maybe he could/should borrow a bit more to have an emergency fund) Maybe his credit could be so bad he can't get anything. DO NOT COSIGN.
You can help him look for a good rate, decide on the term of the mortgage, decide if a mortgage HELOC blend is better for him etc.
There may still be some closing costs and estate taxes to pay so don't forget that or put it all on you (unless you are feeling generous). Also, closing an estate can take a while. Even easy ones can take a year from what I have seen. So tell him to be patient and the estate will probably need to pay insurance & taxes out of the cash until it settles.
He has an opportunity to OWN a place to live for close to $10K, that sounds like a pretty good deal.
Help him with a budget. Can he afford the tax, insurance, utilities & the small mortgage payment?
You can save your $37K as his rainy day fund if you are really generous but I wouldn't tell him about it.
Actual home ownership is maybe a chance for him to take responsibility and turn himself around financially.