Running water/w showers, toilets, fire pit, sounds like fishing is possible....  

There are water stains in the ceiling, the electric needs some help in the floor two bathroom, as well as the water pressure in the shower.

Its possible she sees some kind of weakness there for her to exploit and is testing the waters of what she can get. 

Quote from @Taylor Waters: Hi all, I spoke with an investor via phone that I met through Reddit.

The tenant failed to mention that that was the time they were going to be filming a "home movie" in the water bed.

I believe that the shower in the second floor bathroom is causing water damage and creating the mold in the first floor bathroom ceiling, which may require removing the first floor bathroom ceiling. 

In that same 6 years I have had to replace the stove and water heater, have the dryer and oven fixed, and had a tree trimmed and an eve repaired.

Consider putting in a separate electrical meter, a separate water meter, and separate gas meter.

Also study costs of roof replacements, furnaces and water heaters.

She didn't think the case holds much water but it could be very time consuming resulting in high fees.