Counterpoint: certainly there are people out there who would abuse a rental, but I think the notion that all, or even most, people abuse rentals is unnecessarily pessimistic.
This isn’t quite the same thing, but my wife and I have been AirBnB hosts for several years. The overwhelming majority of our guests have been friendly, respectful, and took good care of our place while they visited. We’ve hosted hundreds of guests from all over the world and we’ve never had a single serious incident. The worst we’ve had to deal with is people being louder than we’d like (we have a strict quiet period out of respect for our neighbors), but even then they were polite and kind when we asked them to quiet down. Overall, we have found the experience of hosting to be surprisingly rewarding.
There are risks of course - you definitely want to have insurance against accidents and liability, and you’ll want to make sure you factor in increased wear and tear and maintenance when you set your price.
Offering up your overland trailer for rent may give people the opportunity to experience a form of camping that may otherwise be inaccessible to them. This could be a good thing for the Overlanding community as a whole.
I’m not saying you definitely should do it. There are real risks, and you should absolutely be clear-eyed about those risks. But people aren’t universally terrible, and there may be more upside to this than you might realize..
Either way, best of luck and safe travels :)
Kris