To answer your Exo Terra for a BP question:
I started my baby bp in a 24x18x12 exo terra set up and found it to be marginally acceptable for me. Used flexwatt under tank controlled by a cheap zillow thoermastat, cut plexiglass to cover 3/4 of screen top to help maintain hunidity, overhead light for additional heat. Wasn't the easiest to keep ideal temps and humidity in this type of terrarium but it can be done. After 8-9 months, she was 45 inches in length, cramped in her exo terra, and I had saved enough for her permanent AP enclosure 48x24x15 and a quality Herpstat 2 thermostat. I love love love my new PVC cage and the Herpstat is awesome controlling the flexwatt and RHP. We keep our home on the cool side year round so both heat sources are needed. If you have the funds, i would splurge on a large pvc cage and divide it in half while she is young and open it up when she's big enough. Will make maintaining heat and humidity much easier.
Beeder question:
I know he's not local for you, but Ben Renick at Renick Reptiles in Missouri is where I purchased my girl from and could not have been happier with the purchase. Ben has always been available to answer any questions i had along the way. Check out his web, www.renickreptiles.com. He currently has several available within your price range.
Good Luck