Right on board with Aaron regarding PVC. If I could go back 6 weeks, I would have just spent the extra $75 and got a 24"x24"x12" PVC enclosure, or a 4x2x1 with a divider for some extra cash allowing some expansion as he gets bigger.
Humidity is relatively easy to keep around 53%, but during shed it is a pain to maintain 65%+. I do need to spray/mix my cypress in order for it to hold enough humidity, but making sure that the substrate below his hides stays dry to avoid scale rot.