I was getting all angry at the “he barely helps around the house” until you dropped the has four kids with four women he barely supports.
My god woman, what the hell were you thinking? If you knew he had four kids he barely supported or took care of before you got pregnant, what did you think would happen? Seriously – he is barely more than a sperm donor. Even if you divorce him you’ll get almost nothing in child support.
At this point, your best bet it to go talk to the other mothers and start a collective home share.
I agree with all the above advice…leave,leave,leave. Let this be a reminder to people/women that as Dr. Phil always says,” The best predictor of future behavior is past behavior.” If a guy has cheated ,neglected his kids, drank too much, been a bum etc. in other relationships…the chances he will do it to and with you are HIGH!