I usually just max out my liability coverage on my properties and get and umbrella policy for protection.

It was a debt service coverage ratio of 1.25.

Aaron, I would check with your local insurance agency on the guidelines of coverage while operating a vacation rental.

Optional coverage varies by company but can include Personal Injury Protection, Water Backup, service line coverage, equipment breakdown to name a few.  

Despite my repeated attempts to seek a resolution and clarification from NREIG, their representatives assured me that the issue was being handled, only to leave it unresolved and unaddressed.Now, to my utter disbelief and frustration, the bank has informed me that we are responsible for the lack of coverage during this entire period.

The homeowners insurance policy probably has better coverage than you may think.

@David Goossens I don't know if your insurance will decline coverage based on illegal activity, but it's worth looking at it. 

Having a professional tenant usually puts mom and pop out of business.The news coverage is also training for the next generation of criminal tenants. 

Sinkhole coverage can be outrageously expensive, if it is available at all. 

You should be able to get FEMA coverage lower than that.