Awesome news!!!
Please make sure all three setups are properly regulated by thermostats, up and running and dialed in BEFORE the snakes come home. If money is tight (which you didn't say was an issue, but is often a reason to cut corners) please hold off on bringing animals home. It's very important to know that crap happens. Equipment fails, animals get sick, etc... and replacing equipment or paying vet bills isn't cheap. So, I always have an emergency fund stashed away. Before getting a new animal, I add to the emergency fund so that I have a stash for each animal.
Maybe start with one BP, then add another when the time is right. Also keep the quarantine process in mind. Having places to quarantine 3 animals isn't easy.