Frankly, I’ve been waiting for someone to sell a PoE camera and offer an optional PoE power adapter/WiFi module. For outside cameras, that would put the WiFi inside, where it should have a better connection to the router. (Although at least a wood framed and wood or vinyl sided home, a WiFi device mounted high outside might have a better connection that something plugged into an outlet down near floor level).
Out of curiosity, do you even those expensive cameras you cited satisfy kae4560’s request for 13(mega)pixels (which they still haven’t explained) and 1-15x zoom? 