In 1986 when traveling in the South, I passed a field full of old mobile homes. They were packed in rows and some were stacked on top of others.
This was on a paved secondary road in a farm area. I assume a local mobile home dealer owned the land and used it as a dumping ground for trade ins too old or too far gone to sell.
I suppose there was a certain salvage value in the aluminum siding, copper wiring etc. but a mobile is mostly made of wood fibreglass insulation carpet and other materials that cannot be recycled.
No junkyard will take old trailers or motorhomes because there is too little metal and too much rubbish. So I don't know what happens when they die. I suppose someone tears them apart and disposes of them at a loss. Or else they just sit around.
This may explain the number of old trailers found abandoned in the woods.
Living in the trailer park of sense, looking out the window at a tornado of stupidity.