But the area has been doing short term for decades due to the theme parks.

You'd need to start working through a preliminary site-plan to validate your assumptions about the building area, parking ratio, drive-thrus etc.

Anyone have any advice on how I can accurately value RV Parks and Mobile Home Parks?

If you are a centimillionaire, legacy holding parks cash that has few other places to sit. 

Quote from @Jason Park: Quote from @Mike Musarra: I'm purchasing a home in a suburb of Cleveland with Hard Money. 

Examples are mobile home parks, RV parks, and golf courses where the value of the property is not primarily derived from building(s) but rather from the improvements to the land.

The price for these 4200 SF buildings are very low about $135,000 per unit leased at $1350 a month and they have high end custom finishes and private patios, covered parking for 2 vehicles and usually all individual meters.

The price for these 4200 SF buildings are very low about $135,000 per unit leased at $1350 a month and they have high end custom finishes and private patios, covered parking for 2 vehicles and usually all individual meters.

  #1 reason - parking is side street.

Thanks I'm a broker on Cape Cod (Berkshire Hathaway Homeservices Robert Paul Properties teamcoker.robertpaul.com) Besides the HOA fees, Points of consideration for Condos are also: #units, rules, location, amenities inside the complex and out, parking.