I'm sure there are people who rent to owners of pit bulls, but they will be relatively few and far between. Unfortunately, many insurance companies put provisions in their policies for homes that the home cannot have a certain breed or breeds of dogs living in the home. Pit bulls are typically one of those breeds, along with Dobermans and sometimes German Shepherds. This is because those types of dogs (and others) are statistically proven to be more prone to bite or otherwise attack humans and animals than other, similar dogs.
It's an unfortunate fact, and I know that, as a landlord, I won't risk losing my insurance over a tenant having a specific type of dog, especially when there is such an overabundance of renters out there. I would also avoid Wellington, as i believe that the town there has a ban on Pit Bulls.
Best of luck to you.