She literally just went through the same disruption with the previous owner, now you are selling less than a year later?

Most good agents have been in this situation themselves and have no interest in disrupting an existing and working relationship. 

I have a drunk, disruptive, rude, pot smoking, 65 year old tenant on a month-to-month that I gave 30 days notice to last month.

There will be emergencies that disrupt your peace (last year during my largest Christmas reservation a well pump needed to be replaced or lose a $5k reservation).   

Try to get them back to back to minimize the disruption to the current tenant and your travel time.

There are some properties I've analyzed that have good cash flow but is solely dependent on tourism and there are many many circumstances that can disrupt that which would leave me  with a high mortgage. 

You can evict someone who does not follow the rules, causes damage to the property and fails to pay for repairs immediately, or who disrupts the neighbors with barking, aggressive behavior, fecal matter on their lawns, etc.

I've had it with my entitled, complaining, disruptive tenants.

Real estate in general is a massive and mature industry that has yet to see the kind of disruption that has occurred in many other industries.

Here it comes:  "But the smell of dog urine is overwhelming and I need for you to correct it immediately so that we can successfully show the property, reduce the number of showings and disruption to you, and not have an issue with your security deposit when you leave."