And how do you keep noise/heat down?

I keep it all down in my unfinished basement away from everything 😅

But for real, I got a used fully enclosed server rack for pretty cheap ($300 CADish) from a company who was moving entirely to the cloud and that thing can keep a lot of noise contained. I have three servers and a chunky network switch so its all pretty loud but when I close the rack’s door it reduces the volume by at least 50%. If its open I’m easily able to hear it from my ground floor but not otherwise