the local council will not usually pay housing benefit to a close relative, and this may be the problem.
also, if he needs to go into 'a home' and pay for care, the council will want it to be paid from the proceeds, so he may be no better off!
he will need advice about inheritance taxes and what will happen if he dies with 7 years etc! it may look like he is disposing of his assets!
BUT apart from these considerations, he can certainly buy and sell his home however he wishes, to his son or a stranger!
cath x