Samsung Tag 2 or whatever combined with uTag. Yeah it’s Samsung but it’s worked well for me.

Nearly any decent PoE camera. I prefer Ubiquiti and Reolink. With PoE cameras you can control (with a firewall) what gets egress to the outside network. Block egress for every camera. Can even go one step further and block them internally but allow only certain ports needed, like 554 for RTSP and 80/443 for management.

I’m not shilling for LMG, but something like Floatplane would make sense. You pay per creator for their extra content and ad free viewing and the cut goes in favor to the creator. Of course Floatplane has to also make money. They’re not in it to serve you ads or use your data to make money. If that took off I could easily see people paying 3-5 creators monthly to watch their videos ad free with extras on one platform.