Shop Security System

[Pro Stock John]

Man that sucks you are understandably paranoid.

I'd say just to build on the comments..

-Motion sensor lights, light the bastards up and then the camera footage will be useful
-Locks or chains through the big door track.
-Make sure your entry door frame is up to task. A baddy with a crowbar can make short work of a cheap door by just bending the door frame out a half inch.
-Find out how the robbers accessed the other guy's place and make sure that aspect of your building is secure.