DUDE...Have you taken your pills? That is insane...
Lighting should be easy...Let's see, 1-175 w MH 10K = 700 w/gall (if 1/4 gallon) That should be enough for SPS and Clams
Would you have any water movement in that thing? Regarding heat, just hold a paper match by it's side every 3 hours and that should do it.
Just poking a little fun at this idea. It should present a real challenge. Maybe do a sump for it, that would give you an area to hide the heater etc..
Speaking of balance, would your skimmer be a HOT model? It'd have to be really light to avoid a tip-over like the flintstones car on brontosaurus burger night.
Just remember not to overpopulate...1 or 2 'pods is all, no matter how pretty they are!
I hope you have a blast with this idea, keep us updated w/photos.