What you need to do is see what the laws & regulations are with wholesaling in your desired state. 

Just curious if any particular type of structure has the best ROI or is the most desirable by renters looking to get away from it all and relax in nature? 

The land is in a very non-desirable area pretty much in the middle of no where so I would assume the cost of the land is low but don’t know how the ROI would be after you had the infrastructure up and running.

However, after their "exhaustive" search of thousands of lenders they partner with, they were only able to offer me one loan. 

Not fully rented, but in a highly desirable location? 

When I search for rentals as a user and not as a landlord the search result shows as apartments with 3 units and when I click it then it brings up all 3 houses and says which unit the user want to go to.I paid for this premium listing and want my listing to be separated out.

A quick google search will point you in the right direction.

I have no desire to be part of any lawsuit or liquidation event.

I think a good starting point would be looking at the comps in your area (recently renovated or new construction homes) that sold around your desired sale price and in your desired timeframe and taking inspiration from there design choices. 

Are there mentors out there that can guide us into searching for our first deal?