wow....that is a tough choice. You sound like a strong woman though. I am sure you will make the decision that is best for you and your children. I am sorry that his drinking puts you in this position.
I guess I would re read some posts on here. And be sure that you are doing what YOU think is best and not what you think you SHOULD do for kids, or based on what others think you should do. I listen to others too much sometimes and worry about what people will think.
Kids are strong and resilient. Stronger than we give them credit for sometimes. many good thoughts going your way from me.