Was involved in a clean out / clean up of a small junkyard that closed down last year. A guy squatting on the property was hauling in mobile homes, and RV's and cutting them up for presumed scrap value.
Most of it was fiberglass, plastics, rubbers, wood, drywall, shingles, etc. A colossal mess, and waste of time, imho. Most of the bulk waste had absolutely no scrap value.