(Of course, there is a factor that higher rating will increase my booking but that is not just coming from adding one or two amenities) Besides item 5 and 6, I am not sure how much other items will attract more guests to my business.

Quote from @Emily Gowen: I own two houses in Portland, OR, one of which I have lived in the last 8 years- but we Just moved far away. 

It's not quite as easy as renting out two sides of a duplex, but with the right marketing and management you could rent out the extra unit to supplement the mortgage payment. 

I just learned all this in the last two days as I’m tearing down a mobile home from the 1960’s.  

In New Hampshire, title laws are strict, so we couldn’t move forward without obtaining a signature from a living heir.The title company dug deep and eventually located a distant relative—a niece of the deceased owner, two generations removed.

If you manage to get this off the ground and do some verified - meaning paperwork is in your name, or company's name, etc - projects that turn a profit, and you build some capital in a bank, you should be able to go right to that lender after a year or two and start a relationship no problem.  

We don’t sell property, but I can recommend the two gentlemen who replied to your post, as they know the STR 34747 zip code well. 

While I’m not a newbie, I own two condos as long term rentals, I live overseas and thus my real estate experience is overseas.

First: Can you commit to living there for at least two years?

Some more than others. two units had wood floors that we kept.