If you have multiple wells just sitting around, why not try a pump and dump setup? Pump the water from the wells and dump it in a pond or yard. You basically have an endless supply of constant-temperature heat transfer fluid for a water source unit. Since your water table is high, it would take little electricity to pump the water.
You could make a proof-of-concept prototype out of a dirt-cheap window air conditioner. No brazing or elaborate copper work is needed. Basically, you enclose whichever coil you're not going to use and pump water through it. Disconnect the fan that originally pumped air through that side. Easy, breezy afternoon hobby project. A sample finished prototype done by a teenager looks like this:
\
Obviously, this one is not finished yet. It is rigged for heating mode and is only 5000 btu capacity. The builder made it to liquid cool his computer to below freezing temperature, and it worked well for him. Supplying this thing 50-60 degree well water would actually provide you more heat than any 110VAC space heater. That is, unless it runs off of another fuel(propane, kerosene, etc.)