If you were living im Melbourne id swear you lived at one of my jobs.Basemant carpark and its always getting rolled.The builders son had video cameras set up but they never worked when something went wrong??and only he had access to the footage.When he moved he took the cameras and joint was still getting robbed.There must be a way of getting power to opperate the camera for you.
Alot of people think that secure carparks are safe but they are far from it.There are so many people living so close together and you will never get to know everybody so the bloke you might see every day might actually be up to no good and not a resident.
Good luck with it.