Sounds like a mess that im currently in...
I've been planning for about a year now, but with school and stuff, i've been pretty busy. Im also making it way harder on myself, becaues im building EVERYTHING besides the actuall glass tank (stand, sump, lights, canopy). Anyways i have been wanting to get back to it, because i've gotten so good with growing all my plants, i want to consolidate them into the paludarium. A paludarium is what your talking about if you didn't know, half land half water.
As for the footprint, you can make it for arboreal frogs, and build layers.
I think we should give each other idea's because i can give you good tips and stuff on the viv side, and you can help on the sump stuff. Im very confused about that. Anyways, let me know, i have some pics of what i did, havn't made it, but i've thought about it so much, im sure it will work.
Also, there is this very helpful thread about how to make artificial rock. Its silicone GEII i beleive, but im going to use that, as i believe its fine with frogs. Great stuff for the structure, then different colors mixed lightly to give a good naturalistic look.
Since we are doing a seperate sump tank, there really is no need for a drainage layer, so i think i can get by with about an inch 'drainage' layer. I'm also using nylon tube for my piping, and nylon hose barbs. Im going to have a pretty intense waterfall, so im going to have a few different sizes of tube, and a few manifolds to reduce size of tubes, while still acompanying the same volume of water. This way i can have multiple outputs, and still have the same volume of water. I will also have a fogging system, that will release next to my waterfall to give a 'waterfall' look. I have 2 holes drilled in the base of my tank, and have 2 toilet parts forgot what they are called, but its a single pipe, witha smaller pipe inside it.
And this is mine so far, just the land/water divider. Theres going to be a single stream that collects in a pool on that structure before its last little waterfall into my 'pond/sea?'
Names aaron by the way. And hope that link helps, because im kinda going off that a little.
And last thing, i know some good pumps if you want to have a variable speed pump, that would be good for being able to control you water speed.