I agree with adopt if possible, though you stated it was not. Rescue or finding a new owner (with the current owner's (who seems to be a jack*** to me) permission.
As MY $.02, please don't give the dog a bad rap because of it's breed. Yes pit bulls are strong, protective and teritorial. Those traights mean that a properly trained and cared for one will take care of it's family. I speak from experience, I do not have a dog because I work too much to devote the time to one, but if I did I would consider a pit bull or mix. My brother and his wife (my teneants in a duplex we share) came home with a rescued one about 10 years ago. I was very sceptical and a bit pissed as he did not talk to me first! She ended up being, far and above, the BEST DOG I HAVE EVER KNOWN. She lived about 7 years before succomming to Cancer. She was wonderful with all people and animals especially children, UNLESS my brother or myself 'gave a negative vibe' for lack of a better situation. If him or I seemed irritated she looked for the source and scared it off. For example a stranger in the yard (we live in the oppposite of a rural area). Never hurt a soul... Though we were careful. She was a trustworthy as any animal I have known. Any animal can be unpredicatable (as any human can be!). Growing up we always had dogs, cats, horses, somtimes cows. Soi have delt with animals!
Sorry for the long rant I love dogs and really hate to see Pit Bulls put down because of their breed ( I do know that not all are good, but that often the owners fault.
Good luck with your situation sorry I could not offer more advice. Attached a picture of our sweet Kylie.....