Not sure, but if you're young (and thus have plenty of time on your hands) build your own! Couple of cameras that connect to your wifi. Motion detectors at entrances. All running over your wifi. A small computer (raspberry pi) to run a program that waits for a signal from the motion detectors, and then starts cameras recording and calls your phone, you then use your phone to connect to the cameras to check what's going on, and can call the police if a nigger broke in, or send a false alarm if it was just coat that fell off the rack. Sounds like a fun project! Also, if you can't get a hold of firearms, get a Crossbow, or take up archery.