Eagle, we did 42 tracts last year. Low end houses about 1700sqft heated. It was really just cash flow when it was all said and done.
Did bulk purchasing through P&S, GE and Senator Cable. Helped a lot! Kinda makes you mad when you see how low those guys can really sell it for.
The problem is your man hours. I payed a bunch of overtime while these were going which ate up the slim profit line. We still had a bunch of customs going and a couple of commercial jobs too.
We humped it the whole way, roughing each unit in 12 to 14 man hours. When it was all said and done i ended up with some real tired guys. They enjoyed the money, but they would have been just as happy working 40 hr weeks in the heat of the summer.
All I can say is beware! We ran about $1.68 per ft with no lights included. Had an offer to do it again this year and passed on it since we're growing our commercial division which is where the cabbage is.... i hope!