You still might be able to get the building insured for under $300/month but options will be very limited and coverage reduced for any property with knob & tube wiring. 

I was checking out your coverage page and noticed that as you scroll down it becomes hard to read the table because the header disappears.You may want to do a "persisten header" (similar to this page when you scroll down) so that the table header remains visible even as scrolling down.

The debt payment coverage ratio (DSCR) helps with that.

I would want to know the debt service coverage ratio the lender looks for to ensure the loan amount won't change in the future.

The casino receives ALOT of news coverage.

Also since its a rental you definitely want umbrella coverage as if someone trips and falls, you would not be covered by insurance and could be on the hook

This typically provides more comprehensive coverage for rental properties.Entity structure:Creating an LLC to hold the property can offer liability protection and potential tax benefits.

If you did not require your tenant to carry this type of coverage and not name you also on the policy as insured you may be out of luck.  

But you would still need coverage for the boat as well.

I had a WIDE range of quotes for my building, but I ultimately winded up using Hemlane for the quote as they had the best price and coverage.