They offered to pay 10% interest on this loan.

Although you live miles away, plan a business trip to the area and maybe hire a local attorney to help you track down the owner or owner's relatives and make an offer.  

Quote from @Robert Ellis:  stop being so patient and take control of your site get a lawyer stop letting these guys push you around. if you need help give me a message I'll call them up and see why they are stringing you along Appreciate your offer Robert and offering to help :) 

HI Rey,Another option of something to offer them is that you'll cover up to a certain amount and any overage, they will pay.

Insurance won’t cover it.

You would of course not deplete all of your cash reserves on the down payment in order to service the monthly debt payment and carrying costs, but this should give you an idea of what you can accomplish now if the time is right.Many hard money products offer 100% funding for rehab costs so you would not need to save for this portion of the BRRRR project.

You can start by cohosting or by rental arbitrage to learn about short term rentals.Some info I’ve consumed has been the following:I like Airbnb automated & the host offers a free mini course called million dollar rental.

Although you can get those wrapped into the loan by making an offer with seller closing credit. 6 months of reserves is a very comfortable cushion to have.

Tenants are responsible for property taxes, insurance on the building, and common area and maintenance costs under triple net lease.

I appreciate any advise you can offer.