There is a thread I read where the guy took a small green house and used the hard plastic swimming pools as the prop tanks and sump. I think he added a AC
unit for those hot day and the heating issue in the winter was a concern but looked pretty cool.
I think having it inside with solor tubes would be neat. Not sure if it would be feasible though. My electric bill is not that bad yet
I know there are guys setting up full scale green houses too. Not sure if it is profitable though...
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,