what we have here is the classic addict reaction to being told NO.
he's pitching a fit and trying to MAKE YOU feel bad for him, so you will open your wallet and sprinkle money all over him again. THAT is what he is upset about. room and board, food, soap, hell even a dog to play with. meanwhile he had ZERO responsibility for anything.
he's perfectly capable to taking care of himself. he found you didn't he?
he will not starve. he will not end up frozen to a park bench. he'll use his "skills" to get something else lined up - either thru taking personal autonomy for himself and his life, or finding someone else to feel sorry for him.