Comment by toprerules

I suppose. You could also use a single desktop and set up your own virtual network bridge, attach multiple veths connected to separate network namespaces, or attach tun devices with virtual machine images running raspberry pi os under qemu, set up DHCP for their virtual mac addresses, set up routing tables, and save yourself some money and time inserting raspberry pis into a pre-built rack. Learning how to set up a rack of servers can be done for free if you already have a Linux machine.