CCTV covering the garage door should deter most thieves.
Why? Unless anyone is sitting up watching it then what use is it really except to watch some blokes in hoods rip you off? CCTV is useless for facial recognition, at least anything we mere mortals could afford. Provided of course that they don’t simply cover it or smash it off the wall.
Don’t waste the time and effort, discreet security doesn’t advertise expensive prizes and if it’s designed to make entry as noisy as possible then all the better.
Oh, and if they’re committed I doubt the car will put them off, easy enough to smash a window and drop the handbrake.