It has a treacherous road and no internet.

You'll want to have internet as well for what you are looking at.

Ok, I have browsed the internet, asked real estate professionals, and dug through my real estate investing books but I still cannot fully grasp the concept of seller financing from the position of a buyer looking to invest in a rental.

Are the written agreements strong or are they something someone just found on the internet? 

If that's the route you want to go, I would highly recommend working with a HML in your local market as opposed to just some random HML you find on the internet.

Also, your renters may want certain things in place, like working internet.

Congratulations, you have found one of the most valuable free resources on the internet for real estate investors new and old.

Granite counters, new appliances, big flat screen TV, fast internet, themed kids bedrooms with XBox/Playstation etc.

It's 3Bd/2Ba (I know what THAT jargon means because of my many hours spent playing CashFlow on the Internet.) 

It's sufficiently off that I'm going to go out on a limb and suggest hopping off the internet and talking to a local lender.