Since you're looking at something two years away, I'd highly suggest working with an area rescue that you respect now. It's the best way to see the truth of the business (and it is a business) and learn from experience some things that work and some that don't. Most rescues don't last long, because they essentially hemorrhage money.
BlueJay wrote:do shelters (such as high kill shelters) move pit bulls from their shelter to another that has more experience with that breed and the space to give them a proper home until they find their forever home?
That's going to depend on your region, almost entirely, I would think. There's the legality of pit bulls and adoption in your area, as well as what other rescues are available for you to network with. The shelter where I work sends out as many animals as possible to other shelters and rescues, but because of the canine population (we're 90 - 95% pit bull) most of the dogs we send out are the non-bullies. If it's tiny and fluffy, it will be in our system for less than 24 hours usually. It's it's a pit bull, it might be months.
We would love to send more out to rescues, but in this area, the pit bull rescues are completely saturated, and it's very hard to find to homes or foster homes for the dogs. Another pit bull rescue in this area would be great, but truthfully rescue work is not cost-effective at all. People complain about how much it costs to adopt a dog (most rescues here are under $200 - my shelter is actually $65) but the fact of the matter is that one dog might cost $500 or more in the time it's in the system. Obviously that's at least a $300 LOSS with each animal.
To join up with other shelters and rescues, you'd have to sign some sort of contract - being sure that both entities agree on things like spay/neuter timing (will you require it? will you offer vouchers for the new owner to get the animal altered at a vet of their choice? will you insist on it being done before the animal leaves your property?) and potential homes (will you require fencing? will you do home inspections? what would make you reclaim an animal?) and that sort of thing.
It's a complicated, exhausting, and challenging industry - I'm glad you've got two years to start getting prepared!