They are now & that would reduce that payback period.<quoted text>
Gullible and Naive don't even begin to describe your childish worldview. The Feds will subsidize 30% of it. All the glowing reports on Geothermal can be found online written by - SURPRISE!- Geothermal contractors. Also, tree huggers jump up and down about it. Green Authors who sell Geothermal books - DUH!- love it, too.
And, of course, you.
Going green & saving money. Oh wait, you're too stupid for that.