I'd make sure the money was not in a "borrow" backable state? Hide it or spend it right away, etc.

I'd try to make some consequences for the time thing; tell him "dinner will be ready at 6:30" or whatever and then if he isn't home, serve/eat it anyway. Have him miss a few things he might have liked to have been present at, all because he doesn't show when he says he will.

If you can think of consequences for his drug addiction in relation to you and (first) seeing that it's messing up his life that would be good too. If same old same old works, why would he change?