So, physical security needs to accomplish, in chronological order, the following against the threat of a potential intrusion: 1) Deter. The area you are trying to protect should ideally scream "Try somewhere else." Steel doors, solid frames, deadbolts, restrictive window coverings (bars), visible tamper proof cameras, etc. There are also a number of devices available these days designed to make a home look occupied, Google "Fake TV" for a number of cheap products designed to make it appear as though a TV is running inside the house. 2) Delay. Given sufficient time and resources, any target can be penetrated eventually; your doors, windows, and locks don't have to hold out forever, just long enough for a potential thief to decide it's taking too long to get in. 3) Detect. Ideally you want some kind of alert if somebody gets in. I'm laying this out for you because the security system is largely associated with number three, meaning you're skipping the most important aspect of all, deterrence. Many if not most break-ins are literally break-ins; they're not subtle. The wooden back door is smashed in or hinge pins knocked out in a matter of seconds. The thieves spend five minutes tops inside searching for stuff that can be easily hauled away in a gym bag. Your detection setup is generally pretty worthless; it's highly unlikely that the cops will even bother looking at the images you captured, much less beat the bushes hunting for mooks who kicked in your door. So focus on making your place look too hard to get in to. Further, since if somebody does get in they're not going to spend a lot of effort searching your nooks and crannies, keep the stuff that has the most meaning for you / is expensive in a special hidey hole; you can build one yourself or purchase something you can set into the wall or floor. If you have a camera, precious objects, spare laptops, external hard drives, don't leave them lying on your desk; lock them up.