I can recommend Grandstream. They have a great UI, tons of features explained in plain English, and powerful Access Points for a fair price. Zero cloud features necessary. Also a US based company, if that matters to you.
But even cooler, the controller is built into the Access Point and is peer-to-peer if multiple APs are in use.
I switched a month ago from a full Unifi network and couldn’t be happier. Do note that they need PoE injectors to power the APs, but unlike Ubiquiti’s they don’t ship with them.
Exactly what data are you worried about giving to Colab?
These hypothetical people should use Google Colab or similar services for ML/AI, since it’s far cheaper than owning a 4090 or an a100.
Yet again sanitization and preparation of training inputs proves to be a much harder problem to solve then techbros think.