Thank you both for the info and help.
I would love to eventually have a cage similar to the one described. I'm defiantly on a budget, and I've got to work with what I've got for now. I like the simplistic design and low maintenance of the cage layout you've described, but I was hoping to make something more natural~ish. I was considering a couple of astro-turf type mats to switch out, but I like the idea of eco earth for humidity and low~ish maintenance.
I defiantly like those hides and will be getting a few of the smalls. I didn't see those acu-rite probe thermometer/hydrometers online, but I'll absolutely look for one of those. I've read on a different forum(don't remember which at the moment) that tanks that are "too big" aren't actually a bad thing as long as you can accommodate the inhabiting creatures behavior. In the case of the BP this would mean more hides, mainly.
Main thing though is to try and make what I have available work. I could probably try to somewhat section off the water feature so that it's inaccessible but the main reason for it would be humidity in a glass tank this big. I could probably make it a lot smaller than I was planning. From what I understand a waterfall is a great way to add humidity, because the water falls through the air and makes a splash.
Thank you both again. I will still continue to research the best available options to make what I've got work for him.