$889m -> $675m -> $2b -> ??? (a cool $710m in the 1Q so annualized like you did with revenue would be ~$3b).
They have ~$2.8b in the bank, so that's about a year if things continue like they have been, less if they hit a snag. Which is why Elon is firing people left and right.
More if they succeed in ramping up the Model 3 production.
If people going bankrupt have marketable skills and are doing everything in their power to find a job in a hot market, I would be brave enough to lend them some money for the transition.
My point is that Tesla's success in ramping up production is not as improbable as you make it sound. They are focussing all their resources on this goal, and at least to my mind, they are likely to succeed.