I don't know specific prices for each element, but to have a ten thousand
gallon
cistern buried or placed on the property, with the plumbing for house
water,
filtration so it's potable, we're looking at around $5,000.00 to
$7,000.00.

After a review of relevant code, I'm not sure what I'm going to do.
Municipal code specifically prohibits anyone within the city limits from
having an operating cistern or well where city water is available. Needless
to say, that puts a bit of a kink in the works. Might need to do a little
political activism on this 'un.

BTW, did I mention that the water utility is owned and operated as a
department of the city?

To filter it, you'd have to call some of the people in your area to find
out
how to do that. I don't want well water. There are any number of toxins
in it
at any given time. At least with rainwater, it comes from the sky, over
the
roof and into the system. Filtering out the sediment from the roof is far
easier than filtering the 70+ toxins found in tap water, on any given day.

We're fortunate that our water is actually pretty good quality as far as
city water goes, but I'd still prefer to get it myself and save the $$$.