About 2 months ago I gave a guy a price to add 3 zones to his existing system. Nice easy add on . Backyard , wide open , no utilities , nothing to cross, easy digging. I figured it would take the 3 of us about 3-4 hrs for the 3 zones ( 11 rotors) So I went $1300 Got there to do it last Wednesday and realzied the valves were already there, the wire had been run to the clock and wired . Pulled the pipe in 15 minutes , an hr to dig , plumb and bury the heads . 20 minutes to adjust and rake the lines. Wish I could get 1 of these every week.