Silly question, but sometimes we all overlook the obvious. Does your parking garage have surveillance cameras? If not, why not? And if not, perhaps petitioning the management to add them would be in everyone’s best interest.
When I park in public lots or parking garages, I rarely use sentry mode because any incident would be captured by security cameras. I’m currently flying home and my car is in garage 1 at Dulles. Sentry mode is off. Don’t need it. Leaving sentry mode on for a week at an airport garage would most likely force me to stop and charge on the way home.
One potential issue is blind spots. But if possible I try locating the cameras and find parking nearby.