Just a lowly biologist. I would love to install a geothermal unit if they were reliable. Had a friend that swore by his until the last couple years when repair costs ate up all his savings, not to mention being without heating or cooling while the techs kept replacing things. The finally replaced a $80 part at the cost of $1000 because the labor to disassemble the unit to get to the part, and then reassemble was horrific. I may assemble my own open system sometime just for cooling using a 30-foot well near the house with an increadibly high flow capacity. Should be free cooling except for the pump and fan.
