This is the layout of the room in my basement that I had to use. It offered 125 square feet of useable floor space and just over 8 feet of vertical height.
There were a few constants that I had to take into consideration. To minimize ph, temperature swings and provide any kind of significant impact in my family food budget I knew I needed >300 gallon tank. With the standard grow bed size depth being 6-12 inches depending on what your trying to grow, a 3" x 2' x 4' light foot print and basic plant height requirements I knew designing the system to maximize use of the space and provide the most efficient grow area was going to be a bit of a challenge. But I broke out sketch up 8 and tried a variety of designs until I came up with one that made sense to me.
I also took a look at several guys in Wisconsin doing indoor grows.
and some commercial systems http://www.growfish.com/s-2005.html
I knew my system would be based on a CHOP system with a singular tank and use a bell siphon for the grow beds. But I liked the supplementary tank idea and "flushing' mechanism from Barrelponics
I knew I needed to have at least 2 x as much grow bed as I had tank and that I would need to water each grow bed singularly to avoid over stressing the fish with high water fluctuations and I liked the idea of this indexing valve but didn't really like the idea of more electricity around the system or the electronics to control it.