I just use cheap IP cameras, Frigate, and Tailscale for remote access. Monthly cost is zero, upfront cost was a Coral, I can check live feed and events whenever I like. Mine runs on a server I already had running, but I have an embarrassing number of cameras, and if I didn’t have the server, I’d have just thrown Debian and Frigate on an unused computer. You don’t have to enable the motion or object detection if you want only live feed; just don’t put it in your config file. You can also control how long events (if you record them) are stored.

US, old house, no neutrals anywhere, 10. Most of my switches are no-neutral Zwave with a few Lutron Caseta where I wanted dimmers. A couple of them are still the original Despard switches because there’s no room for a 4-gang box between the door and window, so those have Zigbee bulbs.