This is a very cool first effort. I don't think it's suitable as a security system yet, because it seems like it would be so easy to overwhelm the relevant spectrum. Eventually maybe.
Depends on the kind of security system. I manage over 150 IP cameras in our internal facility CCTV system and it is expensive to pull Ethernet cables to 10 different spots near the ceiling in a single production room just 20x30ft. I would buy these for $300/each if it meant I only need a couple of $500 hubs at desk level per room.
I'm not worried about sabotage/jamming etc. We are trying to monitor OSHA-violations, accidents, and quality control. If I didn't have to worry about power, I would put multiple cameras in every warehouse aisle, loading dock, and doorway. Local storage is embarrassingly cheap but dragging CAT5/6 all over, supporting ton of PoE switches, and coordinating with facility staff to maintain cameras 20ft up the wall is very expensive and time consuming.
I would also buy like 20 of these for my house and live-stream my mini zoo of prairie dogs, goats, tortoises, and birds.
