Disclaimer: I live in Europe, so my house’s walls are made of bricks and mortar, no plasterboard to easily cut / patch up.
I have a room that is generally cooler than the rest of my home and it’s also far away from my bedroom, so I setup my home lab there. Until now, I managed with WiFi, but I switched operators due to soaring prices and I got screwed since the download / upload speed on this one is kinda shitty. Hence, I want to pass LAN cables from my home lab to my home office, which would mean going through two rooms or, correspondingly, two doors. Since it’s my property, I thought of cutting a couple of centimeters from the door frame and then lead the cables through a skirting board and then through the space cut up from the door frame. What do you think? Any other idea?
Ask around or rent the SDS hammer drill for quick easy work of it. If you need a channel can use an angle grinder with a masonry blade. Use a small pressure sprayer of some sort with water to keep dust down. Use a shopvac and assistant too for the dust. Then with a couple 1" or water deep cuts horizontal use a chisel bit in the hammer drill to chip it out.
You can also use a regular circular saw with masonry blade for horizontal cuts. I’ve fount it easier to cut say 1" deep to get your quick line and make it straight to start then cut full depth as needed and blade will follow first cut. Again light water spray helps. Concrete patch can fill it then a little paint an nobody will ever know.
On inside use angle grinder to cut rectangle for a box at the location. Then chip out, a 3/4" concrete chisel can do detailed work.
Or run conduit on outside. The exterior grey pvc can be scuffed and painted to match exterior.
There’s also lots of different trim options with a groove in back or hollow to run cables.I always suggest 3 cables to every normal location with 5 or so at a tv/media location.
One may be able to run through ceiling/attic area or a basement.
There’s lot’s of info here and in pinned comments.
Home Networking Basics https://www.youtube.com/watch?v=fjRKID2ucPY&list=PLqkmlrpDHy5M8Kx7zDxsSAWetAcHWtWFl
Outdoor Conduit HowTo https://www.youtube.com/watch?v=6vmX-hona2o&list=PLqkmlrpDHy5M8Kx7zDxsSAWetAcHWtWFl&index=2
Just make sure not to use a hammer drill on modern bricks. They have very fine comb like structures and crack if you look at them the wrong way. For hollow bricks the hammering is a neat feature though.