awesome setup it would be great for tree frogs or cresties, some petstores sell exo terra terrarium kits for like a 100 to 200 depending on the size of the tank heres a link to the kits..
Exo Terra - Products: Habitat Kit Rainforest i ahve the small tropical kit for my cresties... they also have a small and medium desert kit aswell.. heres some pictures of my setup

i didnt use the soil cause my cresties are to small soo im using papertowels till they get bigger

the log at the bottom of the cage didnt come with the kit i got that from a different store...