I don't know (like everyone else here, and probably at Tesla), but I think they should open the door to everyone simultaneously, or nearly so. Reason being that the data collected would be incredibly valuable. They would also get a much wider pool of data points. Meaning that data from early adopters who select higher priced options, might skew their thinking, so a larger data set would smooth that out and help material and parts ordering from sub-contractors.
They could also request more money at this time too. So if you stood in line, and are an employee, or current owner, and on the west cost that configures and throws in another $1,000 bucks you move ahead in the que. If they really can make the cars quickly, and can report hundreds, and then thousands of deliveries in the early weeks then it will be a great rollout - which they really need.
To me, I don't want to see Elon get on stage and deliver 10 cars. I want to see a parking lot with 1,000 M3s, and a gate silently slide open with 1,000 owners and their families streaming through to get in and drive away. All with requisite drone footage with a perfectly timed SpaceX launch in the background. As the cars clear the lot, the first stage rocket comes into to land as the last M3 to leave reveals the landing target.
Camera zooms into returned rocket, a door opens revealing Musk in his designer space suit, he flips the visor open, looks directly into the camera and says "Mars was great! I planted potatoes for the next crew, but they better suit up because I've reduced interplanetary travel between Earth and Mars to 3 days, but don't worry, by next year it'll be down to 12 hours."
He closes hatch, skin falls off of the rocket revealing Model W, and he flys away. Because we all know, the Model W, stands for wings.
Fade to new Tesla logo with added rocket streak under it, in plaid. Because all Model 3s ship that way.
