If he is broke within a few days and still not contributing....I think you know the truth. Trust your instincts, they do not have to be confirmed with proof. (like I always thought they did).
For some reason, I spent so much energy trying to prove I was right....when I KNEW I was. Today, I trust myself so much more.
Is he working any kind of program?? IMO, he doesn't sound like he is in any form of recovery.