It is so sad when they will spend time and money taking care of themselves and not their own kids. I know that is one of the things that can hurt the most. It is especially demoralizing when the can't stay away from alcohol for even a short while when the have the opportunity to spend time with their kids as well. It is just another eye opener as to how sick and distorted their priorities become.
Sounds like you are making some postive steps. Hope all works out for the best with the divorce and move ... and that your family's future will be more secure and peaceful.