My daughter is in FFA and she loves reptiles... so this was her project this year. It was a lot of fun. We bought a used curio cabinet on Craigslist. Then she foamed up the back of it, carved it out, and applied silicone paint and stuck coconut substrate to it. She also waterproofed the wood inside. We allowed it to air dry for a *long* time, many days in our dry climate.
She took out the side glass panels and replaced it with mesh. Then she installed the mist system and put it on a timer. You can see the buckets of water inside the cabinets. One feeds the mister system and the other collects drainage.
She made a drainage system and filled that with clay balls and then mesh (to make clean up easier) and some rocks to hold the mesh down.
She installed both a UV light (with screen to protect the chameleon from getting burned) and a heat light on the side.
Finally she put in live plants and fake plants and things for the chameleon to climb on. And of course temp and humidity monitors.
The chameleon is named Harold, and he's super friendly. He's 6 months old now, doing great. If we walk near the habitat he will go to the door that we open the most and stretch his front arms out and beg to be let out and held. :-)