What will be required after you purchase the DVR/NVR and the cameras? Does the DVR/NVR installation require networking expertise, router configuration, or software installation? Is your own company required to manage the ongoing IT related items such as getting static IP addresses, license keys, configure DDNS or VPNs, disk space, configurations, hardware failures, backups, O/S upgrades and other IT related items?
What steps are required to configure your initial cameras and to add new ones? All of this combined overhead costs money – either in terms of hiring experts, or in taking your own time and effort away from you running your business.