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.
Driving in Manhattan is for truck deliveries and taxis only.
If you try to drive a car from point to point in Manhattan, you’re an asshole.