What is an appropriate pump for my needs?

[svejkovat]

I have 1.5 acres of grass and garden. I have a shallow well point in the basement with an ancient little no-name pump and tank that barely serves two hose connected sprinklers. I'd like to be able to run three hose connected sprinklers at full volume with a modern energy efficient pump and tank.

Assuming the point is in serviceable shape (it was replaced 10 years ago) and I have sufficient volume available.... what is an appropriate "plug and play" setup to purchase from a big box store that will serve my needs?

I've tried to research this and have asked for help at in the plumbing department at said stores but can't seem to find any good advice on a simple on-demand setup that I can hook anything from 1 to 3 hoses to and run efficiently. My hose connections are already independent of my city water as I have been using the old basement pump for decades. I'd like to have these sprinkling/irrigation connections/outlets set up so that when they are opened the pump automatically starts and provides water as needed.

Sorry for the lack of specific info. I don't know a great deal about water pumps, but am confident that I can install, plumb, wire, and adjust what I need.

 

[svejkovat]

Do I really need more specific info?

Why is this such a difficult question? I'm told I need to do calculations on the length/diameter of hoses, gmp of sprinklers, etc, etc. Does that suggest that I cannot actually have a simple on-demand system capable of operating from one small hose attached to a small sprinkler, to three large hoses with three large sprinklers.... on separate days depending on my needs?