Establishing a relationship with a rental management company or realtor could allow you to have them manage the property.

I’d imagine it involves establishing and raising a fund with various investors?

I would try to acquire capital and perhaps establish a solid business to get credit lines from the LLC and qualify for bigger loans while removing the debt from your name into the LLC to hold. 

I am 38, I have a successful career in medical device sales management and have a relatively high income of $250k+ per year. 

This will establish your history.

No one asked me, but with that savings, you should consider medical school.  

It was long enough a time period to get the business established and see if the model paid enough to cover a regular mortgage (it does).

As to your issues on contractors you used, I only use experienced and established contractors, licensed and insured, and just about all under "corporate" entities, so no need to 1099, professional investor or not.

Get the medical off your shoulders.Get back to work.

I am not in love with the idea of running an rv park, it just seemed a viable solution to my current situation, as I am trying to establish an income with this investment.