Note that I am a beginner, so please read my comments accordingly:
The actual physical setup works well, easy access through hinged glass doors and the overall size is good for me with lots of room for plants.
I made one critical mistake though, I might have used the wrong type of wood for the centrepiece (old pine) and that has to be resolved somehow.
When having such a tall tank, lighting becomes an issue. I am currently running 3x90w Jungle Hobbies lights and an additional 3x50w grow bulbs. So over 400w to heat the tank from above. I live in a cold climate, but still I need 4 fans (2 blowing and 2 sucking) to constantly exchange the air. In addition there is an internal circulation fan. To accommodate the massive air exchange I have 22 nozzles that spray for a total of 6 minutes per day. Maybe 5-6 liters per day?
All in all this results in a tank with large temperature and humidity variation. It would work great for geckos for example, but not sure about frogs.
The question that I would like to find the answer to without experimenting with actual frogs is whether they would stay away from the warm and dry top 1/4 of the tank?