Ok, guess I ought to chime in here.

Tanks can work just as well as, if not better than, tubs if you're willing to do the bit of extra work to get them there. I agree with the OP that tubs are just more frustration then they are worth.

For a young BP, a 20 gal LONG tank should be just right. You want long and low, since extra height just adds extra problems with heat and humidity control. When and if you decide to upgrade, make sure you get a breeder tank since they are long and low.
Another option, of course, would be to buy or make a display cage for them once they're grown.