I don't buy the argument that it was necessary to build a 7 seater sedan followed by a huge SUV/Minivan. The investment in production tooling would be the same for Model S as it would be for a higher volume small vehicle for middle class and working people. It may be necessary to run more shifts to achieve a higher volume.
This is not correct. In general the more you spend on your production equipment, the less the cost per part. To produce the cars for less, they need to spend more on equipment. That is money they do not have.
People are assuming that the 57,000 dollar sedan will make enough profit in a couple of years to fund the smaller vehicle. I have done my own numbers and I don't see it. How much has Tesla set aside for warranty claims on a brand new vehicle I wonder? As I stated in my first post, the Model S is ego over eco, an ego trip for Elon, Franz and Peter. The sedan has "7" seats because Elon has 5 children.
Again you are incorrect. The Model S will not make enough profit to fund a mass market vehicle. The Model S should make enough profit to pay for the investment to make the Model S. That profit will also pay for a lot of the R&D to make other vehicles.
What it will do is provide evidence that Tesla has the expertise to produce and sell a higher volume vehicle. Doing so will require a lot more capital, and they should be able to raise it if the Model S succeeds.
You also forget that when Tesla produces a higher volume of cars, they will need a much more extensive network of sales and service locations. That is an investment they have not yet made, and they need to see success with the Model S to be able to develop that.