Hopefully they won't delist you since you took action and updated your listing right away.Is it possible to collect the fee up front, then document the vehicle information upon arrival? 

However, an option holder won’t be able to stop a private sale from occurring (unless they find out about it before hand and obtain an injunction); the option holder would most likely need to initiate legal action after the fact. 

Links to your three other posts on this same topic so readers can see what's already been discussed:https://www.biggerpockets.com/forums/61/topics/551577-backyard-homes-produced-in-chinahttps://www.biggerpockets.com/forums/617/topics/551580-china-built-backyard-homes-socalhttps://www.biggerpockets.com/forums/61/topics/537480-tiny-homes-produced-in-chinaThis sort of house is an interest of mine, though I'm more interested in building them on-site with a 3D printer and local materials.  

Tenants eventually tell you who they are by their actions.  

You could do some of the things recommended above but for climbers, put some pictures of the cliffs or climbing action shots in your listing photos, offer discounts to climbers, advertise on climbing websites like mountain project, New England climber FB groups, in climbing gyms in Boston, CT, NYC, AMC or other climbing groups, etc.

Take Action!

Take Action!

Geo leads) seem like a walk in the park.In sum, you want to focus on income-producing activities (lead generation) given the fact that you don't have much time in the day to spend on RE. 

But every day investors buy less than desirable property utilizing high leverage debt at high interest rates producing high risk of negative cash flow and built in negative equity.  

I'd say, could start small—network with folks, ask questions and take action.