I'm not going to worry about Martha having a companion for a while yet anyway. She has to go through her 30 day quarantine, and then get moved into her new habitat. I just want to make sure there is space for her and a friend, whenever I get one to go in with her; THAT friend will go through at least a 90-120 day quarantine before going in with Martha (longer if the size difference is substantial). I do want the vertical space of the 24"x18"x24", but I think I'm going to have to find clever ways to get her to use it; she's very much a terrestrial type. I hope her future companion will be the opposite and help encourage her to climb and get exercise.

...Truth be told I'd like to get an even larger Exo-terra than what I'm planning, but nowhere to fit it. Someday when we do have the space I can happily upgrade.