Here is the lifecycle of Workspace Creation, and approximate minimum times:
Discarding the fact that a single user in AD can only have one workspace… you can see that a single iteration will take at the very least 2 hours.
Note, this is not hypothetical, I just did this with my team for a client
Here are the requirements for the workspace and associated software:
If everything went perfectly each time, we count now 3 iterations at a minimum. Which means the minimum time, if you know what you’re doing, have everything ready, and everything “just works” is going to be at least a full work day.
And that doesn’t include any testing time on the new iteration images, communication of issues back to the team, communication with the stakeholders, or creating documentation and training resources.
If I had to do this again, it would take much less time. But as a zero-to-hero exerience, it wasn’t bad. It just took time.