I live in a tiny town in Northern California, so I have accepted the fact that I shouldn't limit myself to my geographic location. 

If anyone has ever done this, I'd love to hear your thoughts and how you went about it.Here's what I'm thinking: If I hire an employee I can determine the job description.

It appears that the guidelines are very vague and non-descript.

Location, Reviews, Price, and Listing quality (photos/description/rules) are the 4 pillars of an Airbnb/STR property that will drive your occupancy rate up or down. 

Just going on your description when you said this class of property. 

My research so far suggests there aren't very many (if any) viable districts (geographically between let's say Cinnaminson, Mount Laurel, Blackwood, and Collingswood)

If you're in a hot market, I would put up an ad 1 week before you take possession going over all the details (be sure to include as many pictures and description as possible).

In general, the park has to approve the tenant too.The park fee can be higher than local condo fees running in the $500+/month range here in the Plymouth / Carver area where I recently sold one and have another under contract.The other interesting feature is that there is no obvious distinction in our MLS (MLS PIN) between a manufactured home and a trailer home, except for verbiage in the listing description. 

Now why on earth would anyone email the historical district a description of the siding, submit all the necessary paperwork, go through the two month application process, then install siding other that what was originally requested and approved? 

Well, was your contract Specifically for the MH in addition to the land, or was it just the legal description of the land?