That 4" drop is what got me too! We lived on a large corner lot and I tried to use the sprinklers wisely. Still had a $250 water bill one month! Before we moved, we were looking into redoing the yard and taking out as much grass as the HOA would allow, but if you have to hire it done, you're looking at a major expense. We knew we were probably moving, so just winced and paid the water bill.
