First book I would recommend is "The Million Dollar Real Estate Investor" by Gary Keller. 

I believe that option 2 is more attractive to this class of tenant than option 3.

@Ashish AcharyaProperties are all in the trust The tax attorney is talking about a bypass trust but only 3 million goes into that ?

Owner occupied needs to get offer accepted by July 15 to be in the house for the school year, that piece of purchase market will slow way down come August 10. 4 million people in forbearance, with no modification happening yet.

Additionally, if I were to investor-occupy as the sweat-equity, numbers-wise I would assume a duplex would be less attractive than a 3-4 unit property. 

You said you have been reading real estate books for 3 years...Many investors have read 0 and made millions.

- What would be the best avenue for financing my first commercial property between 1.3 and 1.9 million - What amount of capital is currently needed for a deal like this beforehand?

I currently have 1 million for personal liability (each occurrence) and $1000 for medical payment for others. 

Here's what an attractive RV Park deal looks like to a lender: borrower experience, 30% liquidity from borrower, park location in an area not extremely rural, high value per unit.

Does anyone use a population/demographic formula in deciding what those numbers need to be to weigh in on ability to attract quality tenants?