da.bees: The issue is not the well pump having problems pumping it is how the systems work. A well with a pressure tank will have a 20 PSI low to high range. That is just how they work. An example of this is my system it kicks the pump on at 40 psi and off at 60 psi. The flow changes over the the pressure range. My well was tested at 100 gallons a minute flow. So water supply is not an issue.
A private tank system is a problem in cold climates. Plus you need a tall tank to have much pressure. Years ago they would have tanks up on the windmill towers in the warmer areas. Also you have a problem keeping stored water fresh. That is one reason public water is treated.