Details that make this deal a little more complicated:  This park is a non-conforming park in an area zoned, "General Business" with the future use listed as, "Major Business/Retail."  

Especially as it relates to code compliance, zoning and taxes.

A pre-manufactured  is a factory built home or AKA modular home that is built in a plant and disassembled and trucked to a site and re assembled where it is installed on a foundation with a basement or a slab that is concrete that meets the local compliance of the building and zoning departments.

A new foundation was poured and zoned for a single family home as a rebuild.

I took a huge leap of faith to invest outside my comfort zone.  

Do they meet zoning requirements?

But the LLC talk is a red herring at this point.  

So my insurance agent is wanting to insure a investment property, Umbrella policy, a truck and 2 trailers(these are all for business use only) into my personal name there at the insurance company  but have it to where my LLC pays for this while keeping my other personal payments separate.This raises a red flag for me due to the fact that the LLC should be able to have its own insurance and not under my personal name.

Do you know what the zoning is?

Also, most importantly you need to find out if your house is zoned for 3 units, and what the building inspector will require... a quick trip to city hall would let you know if this is possible or not.