Move out of CA that’s the first problem, POS camera to start with. Put up no trespassing signs, and good cameras with a loud siren, When she does it again call pd have her arrested and trespassed from the property.
If your not going it already, you should be using sub streams and main stream for recording. Also direct to disk ect.. there are tons of things you can do to BI to reduce cpu see wiki . One of my machines is running a 2nd gen i5 with 8 4mp camera at 15fps cpu is sitting around 13%
TP link buy more ports then you actually need , for feature updates. I would also get one with all Poe and one or two Poe plus. You are buying now might as well future proof yourself. Also Some TP link switches have lifetime warranty.
TP-Link TL-SG2428P | Jetstream 24 Port Gigabit Smart Managed...
What your saying makes zero sense, you still need to run a wire if it’s Wi-Fi or Poe . So why wouldn’t you run one cable with data and power? I actually find it much harder to install 12v camera over a Poe camera. I have a somewhat large home 4800 sq ft and all my cameras have cat 6...