Thank you for the good advise. I agree that he cannot live at home yet, as I believe there is a high probability he will revert back to his old patterns. In fact, I doubt he has given those patterns up yet, as he still hangs around with his old crowd. His word will have to be backed by consistent action.
Deuce, he has access to professional help and support if he needs if he choose to use them. In the past he has not or done so inconsistently. So the best strategy is to step back, detach and let him work out his issues by himself. He knows he has a life line to grab when he really wants to.