Tesla have been trying to and they are still running into many problems, many industry veteran hires and tens of thousands of cars sold later.
I have talked to many people who have worked/work in production as well, and unfortunately they don't share with you the same optimism on how easy it is to scale up supply chain for a large scale luxury auto company. Daimler-Benz has had major reliability problems with both Chrysler and Mercedes and it took Mercedes over a decade to get back to industry average, while Chrysler is still in the gutters.