Short term solution:
1. Pink noise generator, through a parabolic reflector aimed at the camera (microphone)
2. Small laser pointer aimed at the camera lens, or if that's a problem legally, a small array of superbright LEDs facing the lens - use some on white, and a few on red, green, and blue.
Call the authorities at the slightest hint of a breach of regulations. Pay for a friend to stay at the guest house and take notes of any code violations - health, building, electrical, etc, then hand that over to the Council inspectors.