I would recommend you look at Hotel extended stay or vacation rentals as a solution to your situation. http://www.chateaumarmont.com in Beverly Hills has extended stay available, as well as many other Hotels.
It might be short stay for the owner. Because when you leave after 3 months, he has to paint, clean, inside and change the flooring or steam cleaning for the new tenant. But if that place has been vacant for a long time, the owner might accept your offer for a 3 months stay.