It's great that you are doing anything you have to do, that you are reaching out, and educating yourself!
Now, for that plan. HE WILL come back. He will run out of money and burn all his bridges. You need to have a plan in place so you are not manipulated when you are vulnerable. Do you have a counselor who helps families who deal with addiction? If not, get one, pronto!
Big hugs. You are definitely not alone!