I would like to use Whonix as a gateway for Debian or Ubuntu GNU/Linux VMs that would be administered by untrusted third parties. I could install Whonix workstation as their base system, but since they would have root access to their VMs, they could easily just replace it with another system anyway, so let’s just assume that it will end up as a vanilla (and possibly even malicious) GNU/Linux workstation.
Is this a possible alternative use case for Whonix?
PS. Sorry if this is answered somewhere, but when searching I could only find mention of the reverse use case, ie. using Workstation without Gateway.