Ho folks, having recently conquered my well issues with the downpipe change, and having maxed out its potential, I now think I'm ready to set myself up with a cistern system, in order to get a lot of volume and pressure to the home, while keep the well under minimal stress.

I've read up on the subject a good many hours, and I think a 400 to 500 gallon cistern would be ideal, and I have plenty of room for at least this much. Larger would be even better, as I could then restrict the flow out of the well even further, prolonging the sandpoint's life expectancy.

Problem is, at this point, twofold. First is financial, and the second is really the big problem, and that is I'm limited in tank size by my door opening, and stairway to the basement. Absolute maximum width possible, with the door off its hinges and the hinge removed from the casing is a bit under 35". That leaves very few tanks as usable, with the ones remaining very expensive, and still not overly large in volume.

Now, I'm a handy fella, decently good at pretty well anything I set my mind to. I'm now considering building a "tank" in place. I can either build it in wood(yes, I'm aware of the weight of water, and have already done the calculations), with some type of lining, or even in solid concrete and/or cinder blocks or bricks. But what to line it with? This is our drinking water, so I'm not going to line it with hardware store vinyl sheet or poly-something, as their chemical makeup is questionable. But what about tiles? Ceramic or otherwise. And if yes, what grout? Another option is lining it with sheet copper(BIG dollars) or in stainless steel sheeting(still not cheap, but cheaper than copper!). How about galvanized tin? Or is there a brush-on sealer, maybe an epoxy of some sort, that would seal the concrete 100% and not break down and leach chemicals and harbor bacteria and what not?

My ideal location is a corner of the basement, which is all poured concrete and very strong and perfectly dry(basement is 80% finished and furnished, other than the utility/mechanical rooms). This would give me two concrete walls for the 'tank'. If I frame in wood, I would have two walls of the tank anchored to these two concrete walls, also, leaving only two walls needing to be structurally strong. Would the cement board stuff they use to line shower and tub surrounds and such work with a wood-framed(and plywood lined), followed by a sealer or tiles, or?

I'm tossing a bunch of ideas out, in hopes that someone's been there, done this, and can give me a direction to head into. There's no rush for this, as I can take my time and figure out how to do it best, and most economically. The less the tank will cost, the beter the pump I can drop into it [8D]

Thanks!