Given the labor involved in pulling a submersible pump (especially with hard pipe), there must be a good reason for using them, as opposed above-ground pumps. From an efficiency standpoint, it seems like it wouldn't matter where the pump is located along the path since it still has to pump against the same head. What am I missing here?
As an aside, I recall the pump for my family's lake cabin was mounted on top of the well head. I recall my dad having to prime the pump from time to time, but I always thought that was because the place wasn't used regularly.
Not to mention that most people hate hearing their jet pump come on in their basement.
From a purely capitalistic point of view, pump guys make infinitely more money with fewer hassles servicing submersibles than they ever could servicing jets.