Wife loaned our fully stocked trailer to an employee of hers, a family of 4.
I did question that decision but went along with it....this was years ago.
The family arrived at the house so I could go over the trailer with them and all went well until the husband leaned over and said " hope your truck is an automatic as I've never driven a standard "??.
Week later the trailer returns with damage to undercarriage plumbing, black and gray tank drain valves.
Feel somewhat fortunate that this damage occurred because this is the story I tell whenever friends or family want to borrow or rent our trailer.
The way trailers are built, it would be like renting out wine glasses for supplemental income, NOPE.