I built a 100 seat art house in a 3000 sq ft building with 15' ceilings. i laid it out so one person can run a full house comfortably and i don't have the booth automated. 15' is as low as i would go with a 12 x 22' screen (10 x 21' image scope). my rent is high (location), but my overhead is very low. one employee works when i don't. heating hits a high of $100, cooling works with two swamp coolers and a series of fans and thermostats(this is the NW, not too many really hot days). What makes us work is that I am the one the public is generally dealing with -- whether bitching about the popcorn or being served the popcorn -- and we book very carefully. open three years and about 1/2 way toward paying off all building costs. but, we're very personally oriented. we allow outside food as long as they clean up (no problems wiht this and separates us from the multiplexes), i stay away from stuff that brings in the usual crowd of kids. the kids that do come in are great -- be they punks or nerds. i'm tapped into all ethnic aspects of this college town, so we bring in the latest Asian, Russian, French, etc. stuff. works for me here. i would be careful about applying my formula to a first-run house . . . .