Whatever security you do put in place- test it out yourself,by approaching it from the other side of the fence so to speak. ., motion detectors + cameras have blind spots......
Common-sense in regards to security is freedom of information isn't always a GOOD thing, no offense mate,but i'm guessing here that your either slightly ignorant or innocent as most of the details your relaying in your thread, could be a floorplan for some (insert word).mk.