The park policy does not cover your home
A park insures its own property, roads and common facilities. Your home, your belongings and your liability are entirely yours. Residents sometimes assume lot rent includes some protection for the unit and it does not.
What is attached to the lot can be contested
Carports, sheds, steps and skirting may belong to you or to the park depending on the agreement, and after a storm that question decides who repairs what. Reading the lot agreement once is worth more than the argument afterwards.
Park rules can require specific cover
Many parks require residents to carry liability cover at a stated minimum, exactly as an apartment lease does. That figure protects the park. It is a floor rather than a calculation of what you need.