Earlier quoted context omitted.
I don't know if that's a blocker. Ordinary people commonly rent a $40k machine for 38 hours from companies like Avis and Hertz. If training a large model now costs the same as driving to visit grandma, that seems like a pretty good deal.
That's a great comparison. For a real number, I just checked Runpod and you can rent a system with 8xA100 for $17/hr or ~$700 for 38 hours. Not cheap, but also pretty close to the cost of renting a premium vehicle for a few days. I've trained a few small models by renting an 1xA5000 system and that only costs $0.44/hr, which is perfect for learning and experimentation.
This could correspond to taking public transport in your analogy, and would bring this within reach of most students.