Aha, i'll look deeper! Thankyou very much!

Hey All,
First post here, please go easy on me if things have all been covered before!
Iv been through some of the posts and, as im still new to the whole arduino scene. Iv been dabbling with a few things.
I play Airsoft, and im currently trying to get a bit of technology involved in some scenarios ( airsoft is essentially paintball for Saddo's )

What im currently looking into building is a motion sensor network, which will consist of upto 10 Motion detectors, linked to a central arduino/rasberry pi wirelessly, which is then linked ( tethered ) to either a Tablet, or a netbook ( i imagine a netbook would be easier? ). Each sensor will be housed in a waterproof case with a PIR sensor. It will have a QR Code which can be scanned and "Set", so each sensor can have its location stored in the system, so if sensor 4 is triggered, it will ping the netbook, to say Sensor 4 "Hallway". A dream would be this information is pinged to a smart watch, but thats not happening, yet!
Iv been looking through whats been going on here for the past couple of hours. it all seems to be set around the "Vera". Can i not replace the Vera with a netbook? What sort of hardware am i looking at? For each sensor? An arduino mini,PIR Sensor, Wireless Node?

Any help would be greatly appreciated!

Ash