If they blatantly damage the property on the way out the door, then it could constitute vandalism, result in criminal charges, and perhaps qualify for an insurance claim.

That would constitute self-dealing and risk of a prohibited transaction.

So I was hoping to get some clarity as to getting a 2nd home mortgage and what constitutes as occupancy fraud.

The gun wouldn’t be an issue to me (I don’t know if the new constitutional carry passed yesterday in Florida has any affect on this.) but I would warn the tenant.

That is a recipe for disaster.Consider taking the Path to Purchase course to get a basic understanding and the tools for analyzing deals: https://www.biggerpockets.com/...Learn what constitutes "good" cash flow: https://www.biggerpockets.com/...

In addition, my state has a anti bogus ESA law (AB468), that may or may not be enforceable, regarding what constitutes a legal ESA.  

First thing you need to do is to define what constitutes "hyper"inflation.

There were some concerns brought up that may be fodder for your discussions with your lawyer.In your case, I'd also be concerned that even selling camping rights would constitute development and run afoul of the wilderness designation.

When they signed the lease, the circumstances were specific, and now they changed those terms and that MAY constitute a change to the financial aspect of the lease. 

On a local basis, such collections may constitute temporary housing, such as motels, and the property may have zoning issues.