4 Pioneer B20s per side-What enclosure?

I want to try one last experiment before I fork out 900 dollars for the F200a. If this experiment doesn't work, I can always return the B20 drivers to parts-express.

Price for 8 drivers is only 160 dollars plus the cost for tweeters. I figure I can't lose!

Is it possible to do a BIB with four drivers per side? What enclosure will work in the corners with this many drivers? Am I nuts for trying this in a 10 by 12 foot room? It seems like it has never been done.

I figure at 19 dollars a driver, we should come up with something crazy. Give me some ideas!