your AH has already shown himself to be wholly unreliable as a provider. showing up black out drunk at work is not a minor miscalcuation of consumption. to now still "hope" he can sober up and BE a provider and protector is IMHO very short sighted.
whether we WANT to or not, there are times in life when we simply must take charge of our own lives, future and finances. now is one of those times, i'm afraid. there are many other options besides relying up on the unreliable. get busy researching and reaching out for all available resources.