The main problem with the mid-2019 10k/week target is just the CapEx spends on other projects.
We have to assume that most of the Q3/Q4 profits, should they happen, will be going to the 1.2B in debt payments due before March 2019
and scaling the Model 3 to 10k/week.
This comes at the expense of other projects. Customers are complaining that their powerwalls are
getting delayed. There are still only a handful of solar roof customers. The Semi, Model Y are both projects with significant capital requirements (they weren't even mentioned in the Q1 letter). They also
need to figure out how to expand spare parts and services, which will also have some CapEx.
It's weird that Tesla isn't raising. They're setting back several of their ambitious projects by not doing so.