Financial and occupational issues of freezing coffee? Seems pretty straightforward to me . . . .
It gets a little more complicated when you're going colder than what is available from common refrigeration units. When you're reaching for special duty scientific and industrial freezers, things get more complicated.
Given I've read that "Burning" grinds can be a problem, because grinding produces heat, freezing them to the point that they're brittle and thus shatter easier in a grinder, plus that you're starting at a much lower temperature, thus you have like another 100 degrees to raise the beans before any burning can take place, gives you more overhead.
That said, I'm approaching this from the science angle, as I don't actually drink coffee at all. I enjoy reading about various chemistry experiments involving it though. You can make some very interesting brews, I've read, if you break out various professional grade bits of chemistry equipment.