Vstack is x32 only I believe. As is fxteleport.
without investments, just try to use adat linking systems with digital syncing supported by your cards, and a midi cable for syncing hosts with MTC or MIDI clock. You can’t sync Cubase to clock though, so unless you copy tempo maps and sync to MTC you will have trouble with tempo dependent applications, at least. Maintaining multiple projects on multiple systems for ONE logical project lead to other troubles… It’s simply cumbersome…