housing an adult RTB help?

[Diamond Serpents]

I know that many people keep their BPs and other small snakes in tubs and rack systems, but would it be possible to get a tub large enough to put an adult red tail boa in? Would it be an adequate enclosure? I'm interested in getting a red tail boa, and I've seen quite a few adults for sale on craigslist. six foot tanks are a bit expensive an maintaining such a large tank would be a pain. I take out and play with my ball python all the time, so it would get plenty on exercise.

Check out boaphile the 4' x 2' cages are nice and that's really not to much bigger then a 40 gallon breeder if you think about it.