Put up very noticeable (and some not obvious) cameras. You're likely in for a bumpy ride, buddy. I have a problem neighbor who cooled right down (except for the vicious gossip)
when I put up
visible cameras. Some people aren't happy unless they're mad about something. Maybe that "crazy lady" former owner had a reason, or was that a different property? It's tough keeping up with your gypsy ways.
BTW, complaints to a government entity are a matter of public record, so you are entitled to find out who the complainant is.