I hope he adjusts to the new house, I really dont have any advice for that. On the other hand, I know someone that was in your position before, she designed some shirts, stickers and such and sold them on cafepress.com. I think she earned enough in a couple months or so to do the surgery on her dog, maybe you could do something like that? Here's her page, I think she donates it all to rescue now since Otis had his surgery.
http://www.cafepress.com/operationotis