I'm going to be very blunt. I looked up your older post, skimmed thru some. Get out NOW.
There are shelters for women and their children. Call one. There is no hope of him changing and you are going to regret leaving your kids in the middle of you two with these fights. They need healthy upbringing. I was not at all a great mother. I wish I had left sooner. I did my best but leaving when the abuse is this bad is the only choice there is. Wondering about a divorce doesn't matter. Finances will work themselves out. You may be able to get govt assistance. Please leave him.