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There was an article a few years ago. Similar setup-tourist town located on the East Coast.
This guy worked a deal with his City Fathers. He was able to mount “repeaters” on utility poles along the main drag. Coax was strung to interconnect the “repeaters”.
The coax was connected to each “repeater” as well as a master transmitter/exciter. The master/exciter was your basic Part 15 AM. The RF along with DC power was fed to the coax. Each “repeater” was a single transistor with appropriate input and output coupling; input of RF and power from the coax, output to a whip antenna.
Each “repeater” had a drive adjustment to set the power level. He had about six or so “repeaters” and was able to cover a fairly large area. Each “repeater” was exactly synced in frequency and audio as they all received the same input from the master transmitter/exciter.
Somewhere I have a schematic of the system.