When I lived in the Burbs I daisy chained 4 55 gallon plastic drums (which I purchased new) into the water line...So I had 200 gallons of fresh water that refreshed itself every time someone flushed or used water.

Cheap, easy to do since the water line was right by the garage door, a 1-day project at best.

Now I have a well, and a cistern, and 4 IBCs plumbed into it all.... Oh and a great big honking lake.