Different types of grass require less water. The Marathon fescue variates tend to be thirsty.
You may save a bit on water with a burmuda hybrid. I can’t remember the name but there is a variety that does not go dormant during winter.
Take a look for yourself as it is growing outside the Offshore surf shop/fish and chips place in Carlsbad next to the beach.
I had a large putting green area once that was very level… at first. Over the years, the ground would settle and trees roots would lift areas. Finally gave up trying to keep it flat and put in a pool. Not sure it that was the best idea looking back!
