I and some others have made the decision to provide housing for a family member separate from our own homes. My son currently lives in a house that I purchased, and he pays rent to me using his SSI money. My son didn't have objections to getting onto SSI as a way to pay for living independently.
I'm definitely not MAKING money with this arrangement - I help out with utilities and other expenses - but it provides some needed separation, and has worked better than apartment living, since when he is in crisis, he has always ended up getting evicted.
I continue to consider the possibility of establishing a kind of group setting in the future, where he would have both independence and privacy, as well as the opportunity for socialization and needed support. Its unrealistic to think I can continue to be his sole source of support.