The middle tier infrastructure installer main.ps1 is only available on windows.
The management server is only required during upgrades of the middle tier server (microk8s).
Perhaps you can have the ifsroot folder on a file share somewhere  and run it from your laptops?
I have never tested… 
Be careful sharing such filesystem widely as it holds sensitive information.
Linux support will come eventually… 

The IFS Cloud application installer comes with a installer.sh for linux. 
 

I’m asking because it would reduce our hosting costs to eliminate this machine, and the difference could be dramatic if this allows us to explore new vendors who don’t offer Windows (or who price it like they don’t want to).

The workstation idea is a good one. Latency and bandwidth could be a problem, like when it sends the snap images, but it’s temporary, as you say.

Do you happen to know why there’s no main.sh?