So far, so good.
Okay, we have a 2850 square foot home, four bedrooms, three baths, an electrically powered well which supplies both our electric geothermal heat pump and our house water. We cook with propane, and use propane for the dryer and hot water heater as well.
We have been living in the property, had house guests, ran all systems continuously.
Propane: the dryer is a big expense here, total so far is around $60 per month. We are looking to change our use of dryer with standard controls so that we don't "overdry" our clothing.
Electric: New electric bill just in for $201.71. This means our total utility cost for October was under $265. However, we need to look forward to midwinter, when the geothermal will be cranking a lot more.
We do get some benefit here. Our south-facing house, even with the low-E windows, is warming the downstairs by around 3 or 4 degrees, so that our furnace, set at 65 degrees, is not kicking on.
The house holds heat beautifully. It also, however, holds cold. So if there is a sudden warming trend in the weather, you have to throw open the windows to get that benefit.
We recently had the annual ladybug swarm, and the exterior of the south side was Covered with ladybugs. Only a handful got inside. The leaf-footed stinkbug we have here, which likes white pine cones (and boy do we have those) has also been seeking a winter home. Again, only a few made it in.