Total posts : 45366
dcramer16, there is a less used type of license free radio known as CARRIER CURRENT. FCC 15.221
As you may already know, carrier current sends AM radio frequency on the power lines.
Tim in Bovey is able to reach his whole small Minnesota town with this method.
MRAM 1500 in Ohio is running an experimental carrier current station and is amazed how far it reaches.
I have also run experiments, but in my area the carrier current signal more or less matches my antenna transmissions using a SSTran AMT5000, which covers quite a few blocks in all directions.
I urge you to keep exploring this idea, and even start running trial testing of your own to see what can be done.
Radio Systems is the present vendor for carrier current equipment and assistance.
Besides investigating their website, give them a call and see what they can suggest.