Good for you for getting rid of you AH.
Try to forget the nasty words he told you when leaving - those words are really about himself. He's scared and ashamed of himself and he knows he'll be "staying with" his mother only for as long as she can stand him.
No one lives with a crack addict. Sometimes people try to harbor a crack addict, but when their money and possessions start to disappear, they have not choice but to kick them out.
I feel sorry for your xAH's mother, but she'll have to learn the hard way - just like we did.
Don't be frightened about being single, by the way. It's time for you to heal your Mind Body and Spirit. Take the best care of yourself that you can. I've been single for a while now, and do you know what? I'm ten times the person I was when I was with my miserable Abf! Good riddance to the misery of it all!