Interior or exterior wall?

Change the IP addresses of the cameras

Drill a hole through the wall next to the door frame

You’re not suuuuuuuuuuuppposssed to. Its not best practice. Blah blah blah. Use a shielded cable, ground it, it’ll be fine. Cat 6 is tightly twisted and 120-220 volts does not produce the kind of interference that high voltage transmission lines do.

Can you change the boot drive. Just install an OS on a usb drive and boot into that, install a vpn and browse the internet in peace.

So sounds like you need 4 PoE ports.

You can get a silent 24 port switch and you can get a silent 8 port POE switch, but a 24 port POE switch is designed for 350w (at least, more if its POE+) of consumption, so you’re going to be dealing with active cooling, and considering most are designed to be rackmounted, that means small high RPM fans.

If you care about noise i’d just get 2 switches, one for POE and one for non POE.

Also, a house is not an office building or a hotel. You might have cat 6 in every room, but most people dont randomly plug and unplug in hardwired network devices in different rooms in their home. As someone whose had a home network for over a decade, i find it perfectly fine to go upstairs and connect a new patch cable when I plug in a new device to a previously unused port. So instead of sizing the switch for every possible connection you might make, size it for what you need now + a little margin, and who knows, maybe by the time you need the rest of those ports, 10G switches and network devices will have become more common and affordable.

My 24 port POE switch is pretty loud. But I have it in my attic along with a bunch of other loud electronic equipment. I also have an 10 port POE switch from TP link which is completely silent. Do you really need 24-26 POE ports?