The lease shows THEIR definition of a NN which can vary substantially.

It varies.

Turnout can vary greatly by area.  

Get a copy of the death certificate (this process varies state by state), check the probate files to see if probate has been started....in short, final an heir, make a deal, get probate started.

These things vary by state - but in almost every state, if you are marketing a property that you don't already own, that's a license-required activity. 

Taking that approach, the numbers would look more like this:- pad rent of $300 x 14 x 12 months = 50k (you'll want to do a rent survey to confirm what the market pad rent is) - expenses of 40% (this can vary, but based on what you shared you should be able to run the park near 40%) - NOI of 30KWith a price of 300k, that is a 10cap deal.  

While I think it may vary by region, it may also vary by investor and investor type. 

The lender "may" want to see seasoning (90 days or more in the bank account) but it varies by lender.

DTI requirements will vary by lender and product but I think my lender was looking for something lower than 40%.What would you do differently with the deal to work better for you on your end?

I can look at NYC or Atlanta, or Topeka, and figure out the crime rate and such... but those stats vary widely based on the neighborhood.