What you do is up to you and your husband. If I were in your shoes, I wouldn't be leaving my kids with someone intoxicated. Who watched them before he came to live with you?
Is he there because he needs care? If so, perhaps you can arrange for in-home care for him (in his home). Depending upon his income, it might not cost anything. You can contact your local Agency on Aging to see what's available in your area. I see you're in Pennsylvania. There are many state-funded programs that can help.
Short of having him declared incompetent, there's not much you can do to make someone stop drinking. Not if he doesn't want to stop.
Peace & Love,
Sugah