I can't imagine being forced to choose between my dog and my home, but I would choose my dog. Well, at least the girl. The boy is on his own. (Kidding.) Let's hope this poor guy doesn't react how this other poor guy did when asked to make that decision.
I'm not sure why buildings would be so resolute about not allowing dogs. I would think it would be better to have policies against aggressive animals and careless owners than to ban them outright.