12x12x12 Exo Terra ideas?

[Fishkeeper]

I've found an Exo Terra mini cube on Craigslist, cheap, and I'll be picking it up later today. I'm thinking of making it kind of a bog setting, and I want to use components that will never degrade, with the idea that it will never be necessary to take it down.

My plan is to put a layer of stones in the bottom, then put a mat of live sphagnum moss on it. I know a lot of little bog plants, like sundews, grow in pure live sphagnum, and I'd imagine there are some small orchids I could use as well.

I also plan to use pumice as the background and hardscape. People grow pinguiculas on it, and it should be suitable for orchids and other epiphytes (and not-quite-epiphytes) to grow on if I keep it in some water so it stays wet.

Would an enclosure this small make a decent bog terrarium, or is it too little? I'd want a mini orchid or two, maybe something else that will flower, and a few other small plants that were either bog plants or liked it in bog conditions. Lighting permitting, I'd add a couple of sundews or a butterwort, and probably a bladderwort somewhere.

The lighting for this is going to be similar to my other project. It has a P. emarginata doing well under it, so the lighting isn't terrible, but it's not high-light.

Any thoughts?