Maybe a case for a community colocation cloud where I a consumer can buy a system and colocate it in a large data center with great internal networking. Edit: typo
Handling heterogenous (and potentially untrustworthy) systems also adds overhead, not to mention that buying hardware in bulk is cheaper, so it makes the most sense just to raise the money and buy the hardware.
The problem is potentially solvable as generating solutions takes a lot of GPU time and verifying it is very fast. Aquiring input data may be a problem, but should be possible with dedicated models for this type of computation.
