Money isn't an issue; if the snake won't use the space then I'll keep it smaller. But if a boa WILL use the space then I'll give it. I like watching them display their natural behaviors. For ball pythons that means being a rock, but some of my other animals like to roam. May take some experimenting further down the line. Even if Noel never uses both sides of the bolted unit, I can wall off his half and use the other half for another creature. The reasons the two multi-unit tower cages will bolt together is that some snakes I'm planning on keeping WILL need that kind of space, like Vietnamese Blue Beauties.