If the City stops you because of the complainer.
Get a tripod and a large movie camera and set it up on the side of your court pointing towards where the lady does lessons.
It's legal for you to film yourself, and out in public she cannot expect privacy if she gets in the background.
(besides the camera doesn't even have to work).
When she complains, you can tell her, you had to because the drone is not allowed
I like that idea!
Reminds me of a guy who moved into a development that for some reason banned pickup trucks, commercial or personal. He owned a nicely kept two or three year old pickup truck and got the nastygram about it. So he sold that and bought the scungiest-looking Chevy Suburban (i.e., a station wagon) that he could find and parked that out front instead of in the garage.