Adult tank, how much height

Even though I've still got a good while before my little borneo is large enough to need a full sized enclosure. I'm going ahead and planning out the design and what I'll need.

I'm wanting to build a frame out of ripped down 2X, then line the inside with pvc sheeting. I've come across that a 4' X 2' floor space should be plenty, does this sound correct? But my main consideration is height, how much vertical is needed? I'm wanting to try keeping it within a 4X8 sheet of possible. I can go 1' tall and have a 2'x4' piece left, and can go up to 2' of vertical space. And eat up the entire sheet. What do you all think? The front will be a sheet of glass that will hinge down. So that saves that peice

I'll probably build it as a double tank for when I get a male to go with her, in the over under format.
For the external to make it look decent I can either sheet rock it with the blue rock or luan sheeting. Just for looks to cover up the frame work.

Thanks,
Kyle


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