You wouldn't have a how to post around here on making a custom enclosure would you? sounds cool.

How big would they have to be for it to be a concern? I'd like to keep them forever, so they would get to their maximum eventually. Most sites say adult size for a female is about 3 to 3 1/2 feet. (petco said 2 to 5 feet, do they really get that big?) is that size ok, or am I worrying more about extra big girls? should I plan on 4 females instead, just in case?