Thanks for all of the help everyone! I'll keep all of your advice in mind while I shop around.

Although I still haven't decided on a frog species, I do know that it will only house a pair, maybe three frogs max. I'm leaning towards some type of tinc, mostly due to availability and a somewhat local breeder I know. The mantellas are still high up on the list, but finding non-wild caught frogs is difficult.

I'm in no hurry to get it built and frogs bought. I do have a 10 gallon built and ready to go as a temporary home in case I come across a deal I just can pass up. Its a "practice tank" that I'm basically using as a greenhouse right now, but can easily house a pair of froglets for a little bit. Like I mentioned before, I'm in no rush. I'll keep everyone posted as things develop.