you can sometimes find a used 10 gal for cheap. throw it on its side with a paper towel substrate. and a few fake plants and you done.
and i don't agree with the "juvies get stressed in anything more the a ten gal" concept. i'm not saying your wronge, but these guys are born into the whole world, they are not confined to 10 gal of space. i have mine in the same tank she is in now (exo terra 18x18x24) when she was less the 6 months old and she ran around all night and went back to sleep in the same spot every morning. she found the food and water bowl the first few nights and hunted crickets the second week.