Boy Howdy, I remember how that first month felt. No wonder so many people suggest anti-depressants.
He's got some heavyweights in his corner though, some great guidance, and he's found the right place.
Of course he also has conflicting great advice, so he is going to have to choose. I think he needs to move out (once he is sure he's legally protected), but I see compelling logic not to, as well. It will be interesting to see where it goes.