Based on my ballpark guesses at the cost of the tunnel, I would be surprised if The Boring Company actually made any money on this. They're liable for all cost overruns, and they have to bear the costs of developing the custom Tesla car manufacturing and safety qualification themselves.

The most galling part to me is that I can't see how they make the mandated 4400 people/hr limit. That requires 26 second headways between vehicles (assuming that 4400 people/hr is a bidirectional capacity, not unidirectional), and I don't see them getting station dwell times low enough to permit those headways--airport people movers usually run around 30-45 second dwell times.