@John65 , we had cancellations from interstate due to border lockdowns, so consider youselves lucky!
The issue with elderly guests and technology isn't a normal problem, I'd be comfortable not to take them if they "got stressed and fed up with the verification process".
That's also a red flag - and even though this guest may have been legitimate, scammers are everywhere and once you are out of the AirBnb loop you are in muddy waters.
Envying your winter sunshine..
Cheers, Charles