alt Hacker News> I'm sure that we're talking tens of millions of dollars to get all the equipment needed.
Painting cars really is a hugely optimised process that materially affects performance characteristics such as weight.
Its very difficult to appreciate just how many cars are made worldwide wide, but just think if a completely optimised fully robot optimised line cost a billion dollars, in only needs to process a few million cars to fully pay itself off. Just look at how much a “paint option” costs. Enough people paying for a premium colour would completely pay for the entire production painting line.
Painting cars is also a process that scales. If you want to do a great job on one car everything you need can be had for less than $3000 (inflatable spray booth, large air compressor, a paint gun, and lots of sand paper). A good job can be done for less (a cheap air compressor and paint outside can still get good results), and most people who want to paint a car already have most of the tools so the cost goes down. The above setup will also handle a small auto body shop that is painting a couple cars per month, and you can upgrade equipment as needed (I'd start with a spray building instead of an inflatable booth).
At the scale of Tesla the millions of dollars on a fully automated setup is cheap because amortize the cost of so many cars