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?

Some of you may remember a poll about NASs I recently opened here on the sub. The background was that my HP ProDesk 600 G1 SFF turned into NAS finally failed. Now, I did some diagnostics and it seems to be a motherboard problem. However, I don't really want to repair it, so I will gut it for usable parts and recycle the rest. The reason behind it is that it was a power-hungry mofo, idleing at 20-25w. Hence, now that I have the chance I'd like to upgrade to something much more energy efficient, idleing at < 10w. I am currently looking into tiny HPs and Dells, since they are cheap to get off Amazon as refurbished machines (< 150€) and seem to idle in that watt range. What do you think? TY in advance.