If it happened frequently enough, the government would find a way to tax it.
I have a couple of setups, one has poe ip cams writing to a surveillance nvr which looks after motion detect etc. The other system relies on the camera software detecting motion and writing to a Nas.
Both systems are on their own subnet and are firewalled from everything else. I VPN as and when required.
I’ve found motion detect with alerts to be difficult to tune to get good detection without false alarms.
Unless I’m careful I find I obsess about things, and it isn’t sustainable. Either overload or burn out on it. Nowadays I try to pace my obsessions, do a bit at a time and enforce breaks, sometimes a few days or even weeks. It allows me to think about the subject, lock things down and make links. Sometimes less is more.