Yeah, those are all fair points. We’ve been using Jitsi for work with pretty much no problems, albeit in group calls where video and audio quality don’t matter too much. Someone below gave some good recommendations for hardware as well.
The helpdesk issue… IDK. If Jitsi works, it is incredibly easy to use, right? Basically just, click this link and you’re in. (If does some heavy lifting there, I know :D)