It will be a cost for those slaughterhouses who don't already have CCTV. Many have it anyway. Once installed and it doesn't have to cost a fortune, the ongoing costs are minimal are they not? So, I don't see it as a make or break for small abattoirs.
During the summer here a local hall is taken over and becomes a vintage shop. They set up CCTV during that time for security purposes and it apparently doesn't cost much.