I'm designing a new house with my builder and it looks like I will have a 250m2 backyard. It will be covered with grass and maybe a small garden. My gut feel is that I should get a water tank as otherwise I will spend fortune on water.
1. Am I right that I should get a water tank?
2. What size should I get to be able to maintain 250 m2 of grass?
3. Is there a high level formula that would give me amount of water a day/a week that I need to maintain 250m2 of grass?
I live in Brisbane.