One of our medium size properties decided that this year they wanted to start using their irrigation system ( after it had been off for 3yrs ) 1st question was "how much" ....Answer = BVP test and time + materials. The system needed a new BVP(old failed) & we repaired a total of 27 break points. The majority of the damage was from long spike aerators & bed edgers ( amature lady did it ) the rest were burst points from freezing. The big kicker was once we had it all repaired ...the system has 22 heads covering a total of less than 2k SF of turf. WOW...talk about overkill !!!! Moral of the story is..... maintain your system or you will pay the price & more to re-activate it later. NO cost savings in the end for not running it for 3 yrs.