You could just use Ring cams to watch the jobsite.
You could get IP cams with built in SD cards.
You could get a NVR system with 4 cams like LTS, Hikvision, Synology ect...
Really depends on your setup. Will there be a safe location to house an on site NVR or PoE Switch? Will the location have decent 2.4Ghz WiFi strength to accommodate a Ring system?
-- Thanks, Anil A. Apple Communication LLC. www.apple-link.com Pro-AV - Pro Lighting - Networking - Security Cameras - Home Theater For all your low voltage cabling needs
