It's hard to say, you won't have any of those answers until he has been sober for a while. Plus, the putting the drink down is different from actually getting in to recovery. Really looking at your life and correcting whatever got you there and to stop being so inward looking and realize other people have lives and feelings and worries and the whole world does not revolve around you (him in this case). True recovery means he isn't walking around ill-tempered, battling everyone, miserable.
That transition can be really rocky for many, it's not easy. The fact that he waited to get asked to leave the house before he even attempted to get any help is not a particularily good sign. He will quit drinking the moment he chooses to and not a moment before.
Ideally he would be sober and working at recovery for at least say, six months, before you made decisions about him returning.
I hope you will read around the forum as well, there are probably many threads here that will resonate with you.