Keep in mind that this tenant may not care, and may seem laid back, but one family member, friend, cable guy, etc may raise a concern to them, and start them on a whole new path of behavior concerning the mold issue.

Yes, it's a stressful situation, but that doesn't excuse what seems like unprofessional behavior to me. 

I attended a training seminar recently where they beat into us "structure drives behavior!"

Are you really going to be known as the landlord that lets this type of behavior occur in the neighborhood.

Of course, if other parts of the relationship (including behavioral and financial aspects) would lead the IRS (or the courts) to determine that a worker is an employee, that's one thing. 

You can talk about behavior , what you told him or her , what you did, but in the end the only thing that matters is if and when you get a house under contract.

So the presentation is about to start and I decide to write notes on his selling techniques( I was really into human behavior at the time especially after watching Lie To Me). so He's going on and on and I note how he's making the crowd comfortable and making them like him with his sense of humor and such (I later Found it's called "building rapport") and I also notice on how he plays on some of the older's crowds sense of regret of not working harder when they were younger to build a better life.

Millennials getting more positive about homebuyingRealtor.com: More looking to buy, sales upTrey GarrisonJune 25, 2015 Millennials have become more positive when it comes to taking the plunge into home ownership and are primed to gain market share in the second half of the year, according to the results of realtor.com’s consumer behavior survey of more than 12,000 respondents conducted from Jan. 1, 2015 to June 15, 2015.

Her behavior made us decide to offer her the entire security deposit back if she and her family would vacate the premises by the weekend and find a house that suited them better.

And tenants will probably be on guard with behavior even more with the landlord living in the building.