These could be some great resources. We are going to be building a campground on our property and renting out spots, plus we will have some camping gear and such for rent if needed. Providing tent camping and eventually getting a few yurts. I also want to build and open a private drone park... I don't know, I am kind of obsessed and know people that would pay to come and fly in a safe place where you don't have to deal with the public, or being trespassed, lol.

The problem with doing some things like going through these organizations or companies is they like to start telling you what to do with your land and have really strict stipulations, if you are okay with all that, then yeah, those kind of resources could help. But then again, you did say passive income...