Don’t think CCTV is some magic solution. In terms of solving a crime all it does is give you a picture of the suspect. You still have to identify them. If you don’t recognise them and they don’t happen to be a “known” criminal all you have is a picture! That’s if your system is good quality and was operating correctly at the critical time and the thief wasn’t aware of it!
It will have some deterrent effect and you might get lucky and identify a thief. However it also advertises the fact you have something worth protecting. In my view your money is better spent on better locks, making sure your kit is out of sight and security lights.
I hope this is of some use.