Reddit mentions of Sure Water 260 Gallon Emergency Water Tank

Awesome. This is exactly what I was looking into. How do you do your pumping and what parts did you use? For example, do you have a link to the dealer that sold you the tank? I'd love a 200-300 gallon tank about 6' tall, but they seem a rare thing to find.

So here was what I was thinking. Get myself a large tank that hold maybe half of the day's water as a buffer. Maybe something like this but a foot shorter. I'd then drill holes at the top, once on each side. On the left side I'd have a copper pipe going pretty far to the bottom. Attached to that pipe, I'd have a float switch so that the pressure pump on the other end of said copper pipe wouldn't keep trying to draw water from the tank if there was little left. On the right hand side, I'd put another copper pipe and attach another float, but this one would be near the top of the tank and would make sure the well pump didn't get kicked on if the tank was full. I'd then use a well pump protector to periodically grab water. So it would grab water based on schedule and as long as there's water in the tank and finally also if the high water float switch hasn't been tripped.

This seems to be an absolutely perfect solution that I should reasonably be able to do for under $2k. Again, finding an appropriate sized tank (no taller than 6' and 200 gallons or more) that's graded to hold water seems to not be so easy.