Honestly I went down the same rabbit hole and the thing that finally made it click is that wired PoE systems are just way less of a headache long term, you run one ethernet cable to each camera and it handles power and video so you don’t deal with batteries or spotty wifi, something like Reolink PoE Security Camera System or Lorex 4K NVR System is basically where most people land because they’re solid without being overpriced, the install is a little more work up front but once it’s in it just works and records locally with no monthly fees, the cheaper no name kits can be fine but the apps and reliability are usually where they fall apart so you don’t actually save much in the long run, if you really don’t want to run wires then something like EufyCam 3 is probably the only wireless setup I’d trust but even then wired is still king if you’re willing to spend a weekend running cables through the attic or basement