Mandy, I'm very happy for you and your son that you found another place to live. Both of you will enjoy your new home and the upcoming holidays. It may take a while, not to miss the old place, but at the end of the day, this is your home and you do not need to worry about being constantly on pins and needles wondering when he would contact you again about moving. He has absolutely no power/control over your lives any longer.
As for him, well...he's not only going to be potless, but homelenss as well since he continues down the road of self-destruction. The wifey will leave him high and dry once there's nothing left to spend and the bill collectors begin to knock on their door for the money. She's going to be leaving him very soon when the going gets rough.
The future for you and your son looks wonderful. A new place to call home, a new beginning and who knows what is in store for you both in the new year--life can only go up for you and your son.
Enjoy the holiday season, for I think the new year will be so much more promising for you both.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.