I've been doing this for a couple of years. My PC was in the garage that adjoined to my office. No noise, no heat, no worries about cable connectors. I've just relocated my office upstairs and the heat was getting uncomfortable last night, so plans are now being hatched to get the PC into the attic above the new office.
The reason I would spend so much on a card is mostly due to noise. But the 3080 trio is way too much compared to some other 3080s. I am on the fence of picking a half decent 3080, undervolting it a bit to keep temperatures down and getting an optic dp cable and active usb cable. Like oyu said it gets hot and in the summer it gets really hot with a comuter in the room.