As others have said rack servers are really loud. Instead look for a tower server, they are much quieter as they are often used in office environments. Somethin

As others have said rack servers are really loud. Instead look for a tower server, they are much quieter as they are often used in office environments. Something like a Dell PowerEdge T series. You'll pay more as they are rarer but you'll be happier. Another option is to build some. Last summer I built a couple of servers for my home lab. I went with a 12 Core Ryzen and 64GB of DDR4 RAM. I spent around a Grand each of them. ASRock Rack makes an AM4 motherboard that has IPMI. So they have remote IP-KVM and power control. It is similar to the Dell iDRAC or HP iLO.