Ubiquiti’s offerings can all run 100% locally. I have my entire setup using PoE so each only needs a single cable.

You can also access it remotely, too, which is nice. If you don't have a fixed IP/don't want to manage firewall rules, they have a central service that creates the handshake between your remote device and your NVR to facilitate the connection.

I'm actually planning to do same thing, probably also use that to install PoE wifi access points. I think I also will need VLAN functionality. Which switch do you use?

Also any opinion about their recent fiasco with telemetry?

I've been considering Ubiquiti since I'm going to redoing all the networking in my new house. Does Ubiquiti offer inner sort of facial-recognition-based alerts?

What do you use for motion detection? I've found the Unifi NRV motion detection to be very poor. Especially raining at night.

I'm working on IP cameras sending their video to Surveillance Station on my Synology NAS. Totally local recording, and was super easy to setup with some random IP cam I had laying around.

My plan is to run cable for PoE cameras soon. Will have 24/7 recording, but accessible only locally.

Unifi Has a completely cloudless setup.

https://unifi-protect.ui.com/