Hey, Welcome to the site. I have set up a ton of tanks and there are many, many different ways to do it. The first thing you should do is determine the tanks use. ie show tank, breeding tank, mixed, etc. That will give you a lil direction. Because a breeding tank set up for a pair of frogs doesn't have to be the same size or be as automated as a show tank that houses a group of frogs. I use to try to make all my tanks into large show tanks. And most of what I wanted in my setups was not necessary for the frogs. It was not until I went to Black Jungle and saw their many different set ups. Some were simple and some were extravagant, but even the simple ones were very nice. Sometimes simple is better. But it seems like, by you statement ("false bottom with a pond, waterfall, fogger *light fog* and possibly a rain system") you wanna "do-it-up". None of those things you mentioned are necessary for the frogs. They are all aesthetics for you. When it comes to building you tank, remember preference is everything and you imagination is your limit. (LOL you just mentioned several different good forum topics, false bottom vs leca, water fall or not, fogger vs misting sys).
I will offer you this.....I just built 6 Exo Terra Tanks 24x18x18. 2 were false bottom and everything else all natural. 2 were that had Great Stuff and Malaysian drift wood on the sides and a leca substrait. 2 that had the Malaysian DW glued to the sides. I left the orig Exo back in all of them. Oh, and I also made a 18" Exo cube that had GS on both sides and the back. All are gonna be attached to a misting system. All a lil bit different. It is really up to you. Here are a few pics. They aren't done yet.
This is the one with the false bottom and nothing else
This one has GS and Malaysian DW attached to the sides. Orig Exo Back
This one has the DW glued right to the sides of the glass
18" cube with sides and back covered in GS and a pc of DW
I am in the process of building a construction journal for some of my new tanks, but if you have specific questions about the false bottom, building a pond or waterfall, adding a fogger or misting rain system, create a thread for each topic. It would be tough for someone to answer all the question in one thread/post. Each topic deserves its own discussion.
Again, welcome to the site,
Marc