If you had no knowledge and they broke the lease I'd issue a notice of non renewal, but give them the option to remove the cats.

I would look into assets that are non-correlated to the stock market or real estate, as well as tax advantaged assets to help shelter your income. 

Or, depending on the property you could go non-QM with like a DSCR loan and close in an LLC or partnership.

I 100% agree with the intent aspect and that is an important premise, but the fact is in this particular situation intent for it to be personal use has been confirmed (by way of a public post).

Is it public record that I can find online?

That was fine by me but the communication was not only poor but non existent.  

We rotate locks through our rentals, with a period of non-use for each lock.  

Ensure the buyer provides a non-refundable earnest deposit.3.

Seems to me cohesive set of laws and rules regarding this activity would benefit  both the public and those that want to engage in the activity.  

The wrong tenant can lead to non-payment, evictions, and property damage.