pctek: They say I can get a water tank - sure, I don't have the thousands of dollars for one of them. I know what they cost...
Outrageous Fortunes, are being made by some :-(
I use a series of large plastic drums to catch grey water from the washing machine - usually sufficient for watering the garden. You do need to use the grey water rather promptly, otherwise it starts to pong somewhar after a few days of sittng in the sun, cultivating stinky bacteria ...
I did try once to capture waste sink and shower water. That particular exercise I wont be repeating ... now I just raid the close-by stream that trickles nicely into a couple of deep pools for any additional water when the grey water runs out.
I also use a fair amount of the water crystals, both in the vege garden and the potted shrubs and flowers. So far, I haven't seen any heat-stressed plants, so th stuff does seem to work quite well.
SS