I buy very cheap PoE cameras that are direct from China, and block the living daylights out of them at the firewalls so they can't leak to the internet.
Avoid Amazon Blink stuff if you do this. I set some up for someone and they're a total scam. They advertise a local only mode that doesn't require a subscription, but it's crippled and makes the cameras nearly unusable. They disable thumbnails and bulk deletion of video.
Worst of all, they'll stealthily enable a "trial" subscription for 3 months when you set them up in local mode, so they seem ok until they get crippled with demands for a subscription fee.
Worst of all, they'll stealthily enable a "trial" subscription for 3 months when you set them up in local mode, so they seem ok until they get crippled with demands for a subscription fee.