In Oz, there are huge grants & subsidies for remote properties (varies from state to state). We lived in Hillston for a few years (NSW) when I was over there and we had rain water stored to an underground tank (not a lot thou for most of the year). We also had a spring but both went through a pump/filter system before we got use of it. Due to the remoteness, we also had a sedimentation tank to limit the change on the filter as this was done by the NSW government (the local council in effect).
All there when we arrived.
Best of luck!!!