I totally understand. This is a fun way to do it. A cheaper option would also be to run a lot of virtual machines on a single device and only assign them limit

I totally understand. This is a fun way to do it. A cheaper option would also be to run a lot of virtual machines on a single device and only assign them limited CPU and RAM budgets. You can actually do this all within a single Raspberry Pi 4 8GB with ESXi: https://www.servethehome.com/getting-started-with-vmware-esxi-on-arm-with-a-raspberry-pi/ https://www.servethehome.com/getting-started-with-vmware-esx... Not going to lie: I'd still enjoy having one of these Quad-Pi boards to play with, though.