Can ABC LLC continue to be the main contact on behalf of the new Investor?

As a general rule, you want to use an S-corporation.While liability concerns are an issue, that is not the main reason I am saying to use an S-corporation. 

If he doesn't want to be tied down, add a clause that the seller can accept a better offer and cancel your option up until you notify him in writing that you intent to exercise.3.

I finally sent a letter to their headquarters accusing them of intentionally trying to make it difficult for people to cancel. 

If the lease ends in a month, and the previous landlord didn't provide 60 days, then you can assume there was no intent to renew the lease.

I'm not sure if Indiana offers a non-NFIP insurance option or not but if they are like Ohio than NFIP is your only option... however not all agents understand how NFIP works or how to give you coverage options.If your main goal is checking the box for flood insurance at the lowest possible cost I would suggest asking the bank what is the least amount of coverage  and what is the maximum deductible they will accept - then get an agent to quote it that way.I'm NOT saying this is a good idea to insure your property this way - you really need to investigate the risk and talk with your agent on what your level of risk tolerance is.Many agents will try and quote it at the full reconstruction cost amount like it's an owner occupied property.

It’s a rural river front property and main highway exposure is Airbnb a good option in the valley?

A way that I think I could really come out on top is by living in a garage and renting out the main rooms.

What are the fees, penalties, or other main factors to consider with these accounts?  

Determining the many ways to take advantage and properly expense everything can make your head spin.I bought a house with the intention of flipping in September 2017.