I'm so sorry, beautifulgirl
What a tough situation for you -- my heart goes out to you. It's hard for me to wrap my head around the fact that a "man" would leave his wife and 5 kids so that he can smoke dope. If that is the nature of his true character, then it's quite possible you are really better off if he is gone. I know that's hard to see now. If I were you I'd rent out one of those rooms to someone who will help you watch the children for room & board. Perhaps that is a possibility for you and might just be a perfect opportunity for a student or older person.
I'll add you to my prayer box for sure. ((((Hugs))))