Why not just use remote desktop software to access each system? If you run MacOS you got Apple Remote Access and if you do run a BSD you got pretty much every other method to access the system. A KVM arrangement will give you a stupid large mess of cables. I still do not see why you need a CD drive for each. If you're networked you only need to mount a remote volume and pull data from there. Running SCA drives will also require another layer for each two slices you run. You build a disk image on one system and clone it to multiple CF cards.