I've used Blue Iris with six POE cameras for about three years. No issues to report. Find a used decent quality POE switch, run your Cat 6 and hook it to your computer. Use a VPN (most decent routers will have this built-in.) Blue Iris has apps for Android and iPhone. I have a Synology router setup but, prefer Blue Iris.
It's what I use. POE and Blue iris running on older laptop. So glad to wire up the house/attic with wall boxes and network ports. can move a camera anywhere or add more without much effort.
Sometimes people trip and fall down stairs.
Sometimes assholes push people down stairs.
That doesn't mean "stairs are bad" nor does it make someone who pushes someone down the stairs any less of an asshole.