I think that's Tesla's trick here. In the name of "simplifying manufacturing", they'll only initially offer a single, well-equipped configuration (big battery, leather seats, nice roof, etc). That will make the actual base price of the available model close to $50K, with the mythical "$35K" option set supposedly coming soon. Most folks will buy the available car when their reservation comes up, rather than choosing to wait an indeterminate time for the cheaper model. Then Tesa will cite that ordering pattern to demonstrate a "lack of interest" in the less expensive options, and decide to not offer those options at all.
Think it can't happen? That's exactly what happened with the S40.
I doubt Tesla can actually afford to sell M3's (even lightly equipped M3's) for $35K. This is a way to get out of that promise.