The primary reason an MRI is expensive to run is that it has this magnetic field that must be maintained. This is a cost that is irrespective of whether they are running a scan.
So if you have an MRI for small animals and it’s not being used, you might use it for a hamster.
I suspect that if you add up all the money Youtubers make, and you divide it by all of the man hours people spent trying to make a living off of Youtube, “poverty stricken PhD candidate” would start to seem like a good financial decision.