There is a pretty wide range of property sizes and configurations.

The NJ shore is very wide.

@Sandro Tchikovani the principal and interest amount should be almost identical but some calculators add in insurance and taxes that can vary widely between different areas so the calculators rely on your input.

I don't take closing costs into account when comparing properties, as that can widely vary between different transactions/negotiations. 

And, don't forget that some parks will have a "peak" season, "shoulder" season, and an "off" season, all with different rental rates and historic occupancy, particularly if the park is in a location that caters to snow birds.The nature of RV parks can vary across a wide spectrum.

I also have a family member who’s a real estate agent out of state and recommended I go to a lender they know how does country wide lending (quicken).

99% of real estate agents don't know anything about investing, however, that same 99% of real estate investors don't know what they are looking for when they get started and do make the net too wide by saying things like " find me a good deal" and "I will invest anywhere that cash flows well" so there are errors on both sides.If you haven't narrowed down your towns to 3 or your HOA to be between a certain amount then they might be right, but if you have that all lined up just tighten up what you want and make it easy for them.

Insurance companies have a wide variety of rules and guidelines.  

The fees can vary widely (I had a 3,200 square foot store here in So Cal that was going to be $390,000 in impact fees alone) and sometimes there aren’t any, but you definitely want to know what they are early in the process.4.

The table of contents looked more holistic and covered a wide range of topics in the STR arena, I like how it seems more encompassing.