Thank you again everyone for your responses and advice. I don't want to overshare detail on the internet but to answer a few questions:
They are suing for an excess of $60k.
When they moved in a work order was submitted that the dryer outlet didn't operate and the washer drain was clogged. They are alleging the repairs my PM were insufficient, left them without laundry facilities, and that they reached out to my PM regarding this without response.
They are alleging I took too much time to have a large, somewhat crooked tree removed that lost a couple of limbs and that the was at immediate risk of falling on the house.
They are alleging the refrigerator stopped working and they contacted my PM without response so they had to purchase their own and pay to haul away the one that was there.
They are alleging there was a problem with the septic tank that left them in unsanitary conditions throughout their lease.
They are asking for attorney fees.
They are alleging that my PM overcharged for damages upon their move out and refused to do a move out inspection before they left the property, and that their account was sent to collections without giving them the opportunity to pay, thus ruining their reputation.
There were work orders related to these items (besides the fridge, I never heard anything about that) but the appropriate repairs were made and I was not contacted by my PM subsequently.