Drought is expensive, indeed. You have really adapted to make good use of the water you have. It's interesting to compare the perspective of different places about water reuse. When I lived in Tucson, Arizona, they encouraged the use of kitchen water - but NOT laundry water, unless it was put underground without any chance of human contact. Their concern was human waste. But then they studied what people were actually doing and found that there weren't health issues. So now they encourage the use of water from the kitchen, showers, and laundry - and off the roof and the street.

But then the wastewater treatment plants are finding that the waste water they get is so much more concentrated, that their treatment costs and methods had to be adjusted. And the sewer lines weren't moving the waste down the system, and clogging more often. Because the total flow is so much less.

So drought has a lot of complicated consequences. I hope you are able to keep some of your perennials, especially. Lawns are a nice buffer, because they can go dormant. Here's hoping your drought ends soon.