The home we bought in June is a 10K sq ft lot and moving from Denver with a water bill of 30 a month, when I saw how much grass we had I was concerned. Then I found out that the previous owners were rocking a 300+ monthly water bill. After reviewing the sprinkler system, they were watering 9 zones at 15 minutes a pop twice a day (one in the middle of the day). A few of the heads were busted which was also unloading a ton of water. We reduced the watering by half but the plan is to remove all of the grass, put in a pool (will require a lot of water to fill) and plants requiring no more than a drip system.
I already swapped out a toilet because the rebates are too good to pass up. If anyone wants a 1 year old toilet, hit me up. Free for rehab projects.