RV parks ( we would be new to this area of investing ).

I saw there are lots of roof-mount implementations on parking lots/high schools in CA recently.

., outdoor areas, parking, kitchen facilities).

Maybe try some places or a broker that would insure an ATV park for liability with my logic being if they would insure that, they may insure anything lol

For example, at two events in the past week I met: a Dr. couple looking to get into investing, someone with four houses, someone with two duplexes, someone with a title company and 64 doors, someone with a couple apartment buildings and a winery, someone else with a title company and a parking lot striping company.

You’ll definitely want to dig into the zoning and permit requirements for your area to get a clear picture of what's allowed and what the associated costs might be.Also, don’t forget to factor in things like parking and whether you’d need to add a kitchenette to make it a viable short-term rental (STR).

Its important to carve out personal outside space for each unit and make sure there is appropriate parking for both the primary home and ADU. 

I just wrapped up a 13-acre City Park.

Seemed like a no brainer due to our location outside of Yosemite National Park.

On several occasions, when I’ve noticed the tenant's car parked on the property, I’ve gone over and knocked on the door, but she hasn’t answered.