She had decided the air conditioner of a nearby unit that had been there for a full year where she had no problem with it - was all of a sudden intolerable and she wanted us to tell that tenant they had to remove their air conditioner. 

The challenge happens when they return, find their stuff gone, scream theft and suddenly they had all these other valuables that were also in the suite that are suddenly missing Mr.

That way, you profit anyway.Otherwise, what happens is that when a tenant wants out of a lease, they all of a sudden start complaining about mold and roaches and mice and rats and you-name-it things that they can legally get out of a lease for.  

I don't know what it is about the Internet, where you take normal, polite people, put them in front of a keyboard, and they suddenly become rude, world class delta bravo's.

BTW -  All of the sudden, his income increased by $22,000.   

If they drove to the property, I will walk with them back to the car asking questions, or if they leave, let them get in their car and suddenly have one more question to ask.  

So it sounds like the best answer for *me* is to write a dual letter of notice of non-renewal (with wording to allow for default to month-to-month, which is what happens in Washington, from what I am reading in the statutes) along with a 3-month notice to increase rent.That will give them the 90-days required notice on rent increase & hopefully stop any potential sudden "complaints" that would bar me from non-renewing the lease (Washington statutes seem to say if there is an open "complaint" about a rental, you can't evict or non-renew or it's considered retaliation).You know, the more I write, the more I just want to get her out, sell, and buy 3 or 4 cheap properties......I love real estate and rentals, but when it's your OWN home.....ugh.

Once had an issue with a young military couple coming from across the country; they were happy about the house until they got here and she suddenly got picky walking into the place (not modern enough for her). 

Are you sure it's the a/c unit that's caused the surge in use?  

Then all of a sudden I'd ask them, "So, why are you moving right now?"