I can understand why you might feel "left behind," but you'll feel less left behind if you look less at what he's doing with his days and more at what you would like to do with yours.
It feels better to work toward something when you can, even if it's slow-moving. Work on finding a way to get your own place. Work on finding something you want to do, and can do, even while home with two kids. What are you into? What are your interests? Whatever they are, let yourself get into them. Find something to do for you, and try not to let what your husband is doing consume you. You can go crazy if you continue to view him as "free" and yourself as "trapped."
What is it about the life, exactly, that you are most worried about?
Is it the moving? Him not being home? If he had another job, would you live somewhere else? Would you have a job and not be at home with the kids while he moved on with his career? (I'm not being snarky - I'm genuinely curious to know where the problems are, for you personally. They're different for each person, I suspect.)