It is time to start thinking about rain and rain catchment systems. You can save a lot of money by installing one or two rain barrels. Once you get two in tandem going it is not too long before the idea of gravity feed can come into play. Rain barrels can be stacked to create more water pressure. You could fill a washer or a toilet if you rigged them right. Water would have to be filtered and purified for drinking. For local rain barrels check out got rain?
Tomatoes need calcium to achieve their full flavor potential, and calcium is often greatly lacking in our soils. 95% of a dry eggshell is calcium carbonate. When planting your tomato plants crush up (to powder) about 4 or 5 egg shells and put them in the bottom of the hole. Then plant your tomato on top. They'll provide calcium and prevent blossom end rot.