Congrats on your FIL’s turn-around. Now would be a good time to get his affairs in order, such as wills, trusts, long term care options, etc. Not that my husband and I have dones that for ourselves, but that is what we are going through with my mom. It’s a pain.
my husband and i are both lawyers, his dad is set in that regard.
Better Call Saul.
http://www.bettercallsaul.com/
(My MIL is 94 (lives with us), still drives to daily mass every day Oy Vey!)