What a GREAT idea! Near the top of a hill, as I will be, there should be lots of wind. Maybe I could set up a windmill that fills a pond, with the overflow trickling through the field as a perpetual stream. That would be really nice for many reasons.
I think I'll have to learn to weld to do it, though! j/k 
One drawback: Pumping from the top of a hill makes for a much deeper well.
New Hampshire is a funny place. My brother used to own the house across the street but uphill a hundred feet or so. I think his well was 400 feet deep. Every time I went over there (when the place had been empty for a while), the water smelled like hard-boiled eggs. I gather that that's typical of water found in deep wells.
In contrast, there's my well, only a few hundred feet away. It's just 30 feet deep and was rated by the guy who put in the pump at "more then 35 gallons per minute." That's as high a rating as they were equipped to measure. The water is *always* wonderful.
It's the luck of the draw. While there's water everywhere in New Hampshire, sometimes you get lucky and hit a spring. (Which isn't all that lucky, as I've learned, when you're trying to build a driveway.) Other times you have to go extremely deep before you'll have enough water for a home.
There's really no telling how deep a well from the top of my new land will need to be. At least a hundred feet, I'd think, since that's about how much the hill probably rises above the nearest surface water.
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