I'm hoping to get a Herpstat 4 when I order my customs. I just didn't quite understand how probe placement worked with one t-stat running the whole thing. But even with a Herpstat 4, would I need a fail safe?

As to the room, it's already kept in the 80s. Humidity in the tanks is a problem though, which is why I want to switch to racks. I have to spritz tanks twice a day to keep the humidity in the right range. And I'm glad to hear I can just get one size tubs for now and pack them full of extra hides and foliage.

Thanks for all the responses guys! This has already been immensely helpful.