Well it's a good starting point to work out the number of board feet of which lumber and which sheetings sq. footage of insulation, yards of wiring, etc. Add in the monthly fluctuations for the whims of women involved, the frustration levels of their decisiveness, and your tolerances without resorting to staying at the pub with friends consuming single malts at X * Y and you've a start to the decision to go on vacation and purchase something already built..

LOL.

John Conley
Musica est vita