Except for that crazy loop, everything above ground looks pretty good. Much of those systems is underground. You say 10 GPM pump, so I think the 3 GPM test you did was just to see how much that faucet lets out. You need to run several faucets or take the union loose at the well head to see how much the pump and/or well will make. Looks like a two wire pump, so it has to be 1.5 HP or smaller. Should be fine, especially for a weekend place.