It seems inevitable that all the GPUs are going to live in space

Even being very optimistic with all the numbers, I can't get the math on this to work out to anything better than hundreds of years of operation before hitting the breakeven point. We're talking tens of thousands of dollars (again, very optimistically) for the solar panels, heat pumps, radiators, and launch costs of the above for each GPU. That buys you a lot of years of power and cooling terrestrially.