Go to a shelter. Find charitable private orgs who may offer support or insights. Depends if your kids are with you and keen on what's happening and depends on ages of your kids. You can live in a less desirable neighborhood for schools and rent - private school will likely off financial assistance for 3 kids enrolled. I pretty much guarantee it actually. Swallow your pride and go to soup kitchens to stock up on groceries if needed.
If you have friends to lean on or family to lean on, do.
The worst thing is to stay. Your kids need you and you need you
Have some faith that it can work out because there is no other way but through it. Life will be hard but it's not easy now so choose - your dignity and health, your furore and joy incl your kids as well or having little finances but the desire to rebuild?
A lot of it depends on your kids though. If they are young it's easier, older, maybe stick it through till at least they are almost grad but it's tough if it's 5th-9th grades. You need their support for it to work though - tell them the truth or they will resent you in so many ways.
- the daughter of an abused mom who stayed too long with my dad who was violent with no self control