Does anyone on here have any experience with geothermal heat systems? With all this mess going on with propane prices, I have been thinking about going to geothermal. We just bought a house in SE WI(Germantown) and unfortunately everything runs on propane. It doesn't look like we will get natural gas out here anytime soon and we plan on living in the home for quite a few years. We have 5 acres of mainly flat bare land which I think would work well for a horizontal loop system. My questions are about how expensive is it to install the entire system? Are there still rebates from the government for these systems? How well does it warm the home in temperatures such as the ones we are experiencing now. What kind of maintenance is involved in this system. Any feedback from those with experience is greatly appreciated.