I am about to fly to Florida to look at 3 mobile home parks.

Or "stay away from a 10 miles radius of Z park."

Most up for sell only have one bathroom, or one parking stall, but this one had both!

I just call a good civil engineer in the area.. they usually have a ball park number off the top of their head.. but before I go further ..

There are just design requirements (front porch, parking) that have to be met. 

I'm putting together a mobile home park database.

There is a recent funny situation in California where someone purchased a private driveway to over thirty multi-million dollar homes and is going to charge them for parking.

That makes me wonder which is the recent one and why you used an old picture for the other one.Your price might be in the right ball park if this house were in perfect condition. 

Try Catoctin Mountain Park, Maryland.

I'm also thinking rather than have multiple tenants fight over garage parking, put in a coin operated pool table and maybe even a few vending machines and turn it into a day room type common area...