whatsall: you are NOT your mother. You will NOT allow your DC to be abused, please separate your HISTORY from their FUTURE.
Remember, you were not the one to bail on this relationship. You are desperately unhappy, he is contemptuous of you and this will literally eat away at you.
You feel empty and hollow because this man has sucked the life, love and happiness from you. What role model are you setting? PLEASE think about what you need to do.
Save up the money, great idea, but don't wait until a flare up, tempers and emotions will be raised, and it won't be the best time to sort things out or negotiate what to do. NOW is the time to start talking to your DH, calmly requesting a cooling off period, a bit of space, time for you to ASK on base to see what help you can get and get as much reassurance as to what you need to do, what help you can get and what they can help you with.
You deserve this, you deserve a life, and so do your DC. If your H was such a great man, father etc, he'd treat his DC mother with a bit of respect.