I told my wife construction would take a few days (like it would with wood). Then I started building...end of the first day I had 1 wall 10' long and 42" high...ha! She came out and said "a few days, huh?". In my defense, I was working on concrete that had a 2" slope over the 10', so each stud was a measurement off of the last, and then cut...but definitely much slower than it would have been with lumber without knowing some tricks...