Things to consider when buying a park on leased land

I am looking to make my first MHP purchase and am looking at a MHP that is built on leased land. The land in the park is not owned by the park owner, but is being leased long term from a trust being renewed every 5 years. This seems like a red flag, but if everything the owner is telling me is true the park currently has about a 12% CAP and has 10 more homes that need some work before renting. Does anyone have any experience with a park on leased land like this? What are some things I need to watch out for? If the land owners decide not to renew at the end of a contract where would that leave the MHP owner? Thanks in advance for your replies.