REGARDING DONATIONS: First, there seem to be some people claiming they know him and will take the money to him. Don't trust that. Unless they can prove they actually have contact with him, they are bastards.
Second, he doesn't need rent money. He has Section 8 Social Security. He just needs a place to give that money too. It isn't a lot, but all he needs is to find a place. It's extremely hard to do when you're 64 and homeless.