My FIL is 86, active and healthy. He officiated high school football thru age 85. COVID forced him to retire. He still drives but we are talking to him about giving it up soon. He will live well into his 90s. Longevity is in the family genes. He was recently scammed out of a good portion of his money and it became apparent that he needs to be watched over more closely. We have been discussing this move with him for the last two years since my MIL passed so it is not sudden and he is willing. He will pay us a monthly room and board. We have spruced up his room with new carpet and drapes. We already have an extra large walk-in shower but we will need to expand our half bath into a second full bath with an accessible shower. I don’t think we will need any other accommodations to our ranch style home but he will contribute to these renovations as we are retired too. My concern is that I do not trust my SIL or BIL and want to be sure that hubby and I are protected from accusations of abuse or financial impropriety that could ruin us.