ihad a 24 x 36' two story shop building with 10' ceilings on the first floor and 8" on the second done for $2700 . There are no interior walls, just a shell. I have hung a fair amount of sheetrock and I was going to do it, but my wife talked me into contracting it out (wasn't too hard). What was most impressive to me was that four guys hung all the rock before lunch on the first day. Walls, ceiling,stairwell, all of it. I would have still been trying to figure out why my first outlet cut out was for a left handed version of the room I was working on. I was amazed and felt that it was worthwhile. At the time, the materials from a big box were around a third of the installed price. BTW, if you are going to insulate, have that quoted too. I was going to do that as well and it was a wash between buying the insulation and having it done. That was a very simple decision. That crew was done by coffee break.