he DOES have places he COULD go, he is simply choosing the easier softer way, aka next door neighbors. you have been taking care of this man as if he were a lost FIVE YEAR OLD. he has had all the support he could ever ask for. he doesn't want to get better. left to his own devices, he will have another drink, thank you very much.
assuming that he is a full grown adult and has in the past actually HAD a J.O.B. he is certainly capable of making the choices of a responsible productive citizen.
it's been ONE DAY. he hasn't made it more than 500 yards from your doorway. give time time. for you. and trust me, he'll be slinking back looking all pathetic, tugging at your MOMMY hormones. remember that you are not his mom, and he doesn't need looking after or someone to remind him to brush his damn teeth.