I have 3 tanks(11,000 litres) and recycle my grey water, but have been on town water now for 2 weeks.(its killing me and tastes like crap)
I grow my vegies and fruit trees and it doesnt rain for a good 6 months.
Just waiting for the wet season to top me up (got a little Last night).
We have the highest water rates in Australia
$500 to be connected plus usage at the highest rate per litre in Australia.
We are getting a desal plant being built at the estimated cost of $40 million.
To service 1500 odd people,cant wait for the next bill.

A 10th of that could have either recylcled the sewage or provided more tanks with minimal ongoing cost or both.
I will put another 2 tanks in when I excavate for a carpark and connect another section of verandah to the tanks.Will also set up alot of my vegetable garden to hydroponics and eventualy aquaponics,have done tomatoes and strawberrys so far.