Another thing you could do is he deeds you the house now and you could give him a life estate, which means as long as he lives, he's allowed to live in that house.
另一种做法是, 他现在就把房子过户给你, 同时你可以给他一个终身产权,这意味着只要他活着, 他就有权住在那所房子里。 在他去世之前, 你不能出售这房子, 除非他签字放弃并解除这一权利。