I don't know if building an entire cage out of wood is a good idea. Maybe someone on here has done it before though and can tell you how and if they did it successfully. I think the high humidity would not be good for the wood. I do have a wood frame in the front of the 55 gallon I converted, but that is a very small frame and it is in the front, so no water gets directly sprayed on it.
Alsao, I have a feeling this is going to get moved into the "Cages, Breeding, Feeding" section, since it is soley about caging.
1.2.5 Crested Geckos (Fidget, Sprinkles, Midget, Foxy, Chili, Skittles, Poppler, and Perdie)
0.0.1 gargoyle (Pickles)