before i started my machinist career, i worked at a house trailer plant for a few months.
this was at the time when 14 wide by 70 feet long trailers were no allowed on Pennsylvania roads, but the place was building that size trailer exclusively, as it was expected the law would change at any time. [and it eventually did]
a person wouldn't believe what those idiotic workers put in the walls of those trailers to make them stink, and be a hard thing for the obnoxious smell[s] to be located...........
i'm glad that stint only lasted a few months ! my machinist career was MUCH more rewarding.