Hi, music, welcome! Sounds like you have been doing some great stuff for yourself.
One question, have you talked with a lawyer yet? If not, I'd suggest you make that a priority. He's working, and would be obligated to support his children. You might also have the right to rehabilitative alimony while you get on your feet financially. It's important for you to get good legal advice to protect your financial situation so you're in the best possible position when you're ready to leave.