anything that would involve personal gain, and skill tests should he handled while IN GAME and not fluff rolled on the side to score some extra cash...
So the "pawn store heist" would be better served as an actual run and not something done on "downtime" (which is traditionally used for health recovery, increasing skills, and purchasing toys)
Security he could expect to find?
Contact switch gates on the windows and doors (open the gate, you break the contact, and it sounds an alarm)
Motion sensors,
Cameras,
a drone or two,
Floor safe (embedded IN the floor.. would require a jackhammer to get out)
Wall safe (same idea as above, but bigger!)
Contact and motion sensors IN the safe. (open the door, alarm sounds)
Bubba the Troll security guard.
Tiny the troll Security guard.
(Remember, some pawn shops operate 24hr a day.... and those that don't... generally aren't worth the effort)