@Kman I get the risk you are trying to managed, but something as simple as any environment where a cleaner or cleaning company enter, is likely to fall foul of a power socket being meddled with, causing something that needed power being turned off. We added UPS into one of these setups but if the cleaner came in on a Friday evening, it didn't last until monday. In most of these causes, there is an isolation switch on the upstream device, should you need to isolate the system being given power.