Oh boy~ here I go....
Missi has this tank stuff down to a science and so she is great resource for you.
I am here to attempt to pull you to the dark side!!!! Would you ever consider a reptile cage? I have these: http://www.reptilebasics.com/2x3-Cag...h-p-16286.html
These cages are wired with flex watt and so you just need to get a t'stat. They hold their heat and humidity and they are really just plug and play set-ups. It takes away all of the tinkering and futzing around that you have to do with a tank (take that as a testimony to Missi's fortitude) and they are just really great. This size will fit the royal for their lifetime.
So, whenever I read about people running out all the time to tweak (seemingly forever) with their tanks, I just feel compelled to offer the idea of a true reptile cage