The best place to put an AM transmitter is in a swamp. It is also the worst.
WLNO-AM is located in New Orleans, Louisiana. To put out its 50,000 watt daytime, 5,000 nighttime signal required 7 antenna towers.
Here is some of radio message board Gossip. Hurricane Isaac in 2012 flooded the site leaving the buildings full of mold and asbestos. The station reverted to the bank holding the loan.
The towers were torn down, the equipment removed from the property, and the FCC has agreed to let the station run on a long wire at low power while they decide what to do. AM signals radiate outward perpendicular to the antenna, so a long wire antenna is highly directional and without a ground system, basically useless.
The new owner paid $60,000 for the license and gear like the satellite dishes, break room table and cart machines in order to run a gospel music station.
Cart machines were a little like 8 track tapes. You kept them in racks, and when you inserted a cart into the player, it would position itself to the start of the audio and automatically fire off when requested. They were used to store advertisements primarily.
My impression was they could be linked together so that when one finished, it would start the next one. Magnetic media is a problem – each time it is played, a small amount of the signal is lost. Cart Machines died about 25 years ago except stations that had no money and/or resisted technology and were happy being dinosaurs until they died.
Computers using digital media stored on hard disks don’t have that issue as long as your computer is not grabbed by ransomware because a DJ used it to surf for porn. Digital audio is 100% reproduced and can be reproduced an infinite number of times, hence the quandary the music business has.