Some of the occupants use them as vacation/occasional use, others are PTs, and some are full timers. 

We occasionally do private lending but mostly are investing in RE and Notes.  

I have seen the occasional tenant pour cement down the drainpipe or other intentional damage(No they were not prosecuted) but that is rare as well. 

Yes, there is regulation and licensing involved, but if you are doing everything right, there is no issue and occasionally a speed bump.  

There are also 2 indoor cameras: one in the kitchen to make sure nobody forgets to turn off the gas oven or leave the sink full of dish.

Any tips of getting an air tight 6 month lease without dishing loads of money to an attorney?

Homeaway not so much, but that's fairly easy to do.Brevard also checks in occasionally on safety stuff like fire extinguishers and we maintain our wells with water quality checks every quarter, I've never been asked by Brevard to produce them but we have them anyway.

Also occasional calls from agents wanting to sell it for me - off market. 

QuickBooks allows you to see all your properties at a glance and how much income they made for you, expenses you dished out and their bottom line.And QuickBooks will allow you to view each property individually to see how much that property made you in income less expenses equaling your bottom line.

I'm just on the other side of the Smoky's from you and occasional take day trips over towards Asheville.