There are big costs. The hardware, the facility (RF cage and chillers), power, water, staff, RIS/PACS etc etc.
I can’t see how you can do it for $50. Does the ‘universal healthcare’ bit mean that the government is paying most the bill and it’s $50 out of pocket?
Yes, $50 was a rough out-of-pocket estimate, the amortized cost per scan for operation alone is probably on the order of hundreds of dollars per scan, assuming high utilization.
One funny thing about MRIs is the magnet is always on, so there could be some clever ways to reduce costs running them after hours.