Depends on how much more expensive autonomous car is. If such car is 1 million and regular is 100k and lifetime of both is 5 years you can pay more than 20 per hour to driver...
The hardware (ML chips, failsafe systems, LIDAR, radar, cameras, other sensors) isn't cheap. I'd expect an autonomous car to cost at least 5k-10k more if mass produced at a similar scale, and probably more than that in practice due to smaller numbers. Plus R&D of course.
