Well, Balls and Boas have different temperature requirements. Ball Pythons like it a bit hotter(92-94 warm, 82-84 cool) and boas 88-90 warm, 78-80 cool. For the boas, you could probably use the 41qt sterilite underbed boxes. They have good floor space, but it wouldn't last very long. Some 4x2 cages would work well and they aren't too expensive. For the Balls, it all depends on how big the snakes are. For juvies and shy, small adults, I use 15qt tubs. For adult males and sub-adult to small adult females, I use 32qt tubs. For BIG girls, they get 41qt tubs. Hatchlings get 6qt shoeboxes up until they are about 400g.