You can install on a workstation, then drag it over. Most things work except future patches. Doesn't sound like they will need IM, SO, PO etc. At the point they need the patches installed, copy everything from the server back to the original workstation, install the patches, then copy back to the server. Seems a bit idiotic. Even my medical installs provide access to the server for the initial installation. Hope you have an idiot rate priced accordingly.