Fanless audiophile PC sells for close to $30,000 — music server features dual Xeon 10-core CPUs, 48GB RAM, 280GB Optane SSD, and 2TB secondary storage expandable to 24TB
I feel like I could build a nearly silent PC for 1/10th the price and serve a lot more than just audio from it, and still be comfortable with keeping it in the room with me
Noctua literally has a consumer grade fanless heatsink that is allegedly just as good as advertised for like 100 bucks. Find a quiet PSU and you're basically done. Unless it needs a GPU which could be more problematic
You can get fiber optic extenders for USB, video, networking. They can be spendy, like $1,000, but it's a one-time purchase. A lot cheaper than this computer
Or just... longer cables. Ethernet is already designed for long cable runs, and USB and video cables are easy to find in lengths over 10m (though good ones are a bit pricey). You could even make do with standard cables if you set up against an interior wall and pass cables through the wall to the PC in the adjacent room.