You know what to do. You need to leave like he says. It won't matter if you want that money. You truly do not need it. Believe me you will be glad to tell him that you don't want any of it, no thanks.
The shelter will help you to find low income housing, they will take you to file out papers for food stamps, child care so you can look for work or go to school to get an education so you can support yourself and your children in your future.
Here is a link to the site where you will apply for a monthly check. They will pay your child care, give you food stamps, help you get housing, help you with transportation, etc...it is the state program to help struggling families to a point where the are more independent.
https://dss.sc.gov/content/customers/finance/fi.aspx
Since you have 7 children you will be able to get enough money to pay rent, utilities, some other expenses, you and the kids will get state medical cards, you will be able to take care of your children and yourself and he will be able to stay at home and drink himself into a stupor.
With the benefits you can get you will have freedom to live a life and make something of yourself. You will be free of him. If you choose to not make this break from him you must not want to be free bad enough. The information is there when you are ready.