Good luck, bonny. Steph, it's probably a combination of retired (so lots of free time), intelligent (to find what they're looking for), and enough knowledge to craft an argument but not enough to really know what they're talking about. Plus the sort of personality that doesn't let go when they feel aggrieved.
He's in his late 20s. And, in my experience, super manipulative. After I told him we would not charge him, though we did show up for the appointments he requested, he tried to get me to say that we were a) unreasonable for charging for the walker's time under these circumstances and b) that we really ought to call to remind people like a doctor's office does.
For a $15 appointment? Really?! You can't keep your own calendar?
He also whined that he had just gotten divorced and that life is really hard for him and we should understand that. As a divorced person, I totally understand. As an ADULT, I keep my own calendar, dude.
My favorite part was, "I SAID that I might not be there."
So, we should show up at the time you requested and be cheerful that you let us know you are a flake? Right.