My first thought: If this ever ships, I’ll eat an outboard motor.

Without wires you have no permanent power. Also, it sounds like you want it to be wireless transmission without a network. That’s a challenge.

Lets Ignore the “no cables” part then. If you want this to be cheap, highly reliable, and non-networked… use wires. You can’t go wrong.

You can get 4 camera systems with local storage from companies like Lorex for a reasonable price for good quality. I got mine at CostCo for $299. It might support cloud storage (maybe?) but I never enabled it. It just records locally. It’s been running for years with no downtime or issues and the cameras still look great.

So… back when I used Pidgin, I aggregated AIM, YahooIM, GoogleTalk, and Pre-MS Skype. What is the use case today?

I don’t even trust that. Google devices hard-code DNS and IPs and… I have no evidence or knowledge of it, but I assume that they have some Sidewalk-like ability to communicate directly to other Google devices to get outside the network you want them to be on.