Sounds like a solid plan, and I’m all in. Let’s keep it simple and fast: use a Raspberry Pi cluster with cheap Pi cameras for visual feed, plug in a YOLO‑tiny model for object detection—fast and cheap. Add IR motion sensors on the perimeter for a low‑power trigger, so the Pi only turns on when something moves. For communication, a local Wi‑Fi mesh so alerts ping the whole block instantly. If we budget a bit more, throw in a couple of low‑cost drones to patrol gaps, but keep the ground system simple. Trust the community to flag any false alarms and we’re golden. What’s our first step?