The minimum recommended enclosure for a full grown MALE BCI is 4x2. Females should have at least a 6x2. If you can find a Christmas tree tub, that might work for a male. There are some racks available to that would work.

I personally recommend www.pvccages.com. Jim makes wonderful cages at a very affordable rate! If your only going to have one and don't plan to breed, you wont be sorry having a pvc cage from either Jim or AP.