He chose a hybrid approach. He bought one official license for the fourth camera trained on the cash drawer, funded by a few nights of overtime and a small grant Mei offered for building security in the building. He set up an independent NVR for the alley camera and a humble old phone for a temporary front-cam backup. He layered protections: a strong admin password on the NAS, firewall rules, and unique credentials for each camera. He scheduled nightly checks and an automatic backup of crucial clips to an encrypted external disk.