Jim those cages are fantastic, You have got my brain rolling on some designs i could do for myself. One question i have about females is the difficulty to locate her dig site after she has laid. Seems some of my females hide where they dug very very well. Although i love the idea of growing your garden inside too what a fantastic way of using the water from one source for another. Look forward to seeing some of those young faly's. Do you notice that the females stay on the lower end of the tree while the males perch up higher in the tree's?
Chris
Missing a female laying is always a possibility, especially if you have lots of them, and group cages such as this. In these cages, we keep the ground clean, and very visible. We also check the ground closely 3-4 times a day. When we see a female digging, we mark the spot with a plastic arrow about 8" long. Additionally, if you miss it, a female that has laid will be dirty for several days, so you will see her, then know you have to look for disturbed soil. Its not that big of a risk if some attention is always applied.
If the cage is big enough, the females will go high and low. The key is to have the cage large enough, and animals raised such, that you never see hostility. At 8 AM this morning I caught my Faly's getting a slice, high in the cage, on some of the watering pipes. That's what its all about.
In fact, late today I installed the night bug set-up. Its a dome light and manifold, attached high on a side with an open-close screen door. After sun-down, when the chameleons are immobile, I open the manifold-access door, about 18" X 14", with a light inside that I turn on, to pull in the night bugs. To get the big moths in, I also have a situation where a sleep-walking chameleon might could escape, as the only mesh over the opening with the access door open is 2" X 4" welded wire to keep the raccoons out, although the manifold reduces the chance of chameleon escape to almost to nil. I want the big bugs and moths to get in. Bill Love, a good friend further south, was experimenting always with getting wild bugs into his outdoor cages back in the mid 90's. There's no book to go to ! About 7 AM tomorrow I will wander out, turn off that light, close the access door, and hope the chameleons feast on some of what came in overnight.
Wild bugs are the nectar of the gods.
I believe one male could easily maintain 12-15 females if the tree/area large enough. 
