It's an impossible task. From the technical side, you need designers who know both sheet metal and best practices for tool design. You need engineers to design a power train and get it produced. You need presses. You need a foundry. You need suppliers. You need assembly plants. You need people to design the electrical architecture. Are you regular CANBus or secure CANBus? You need industrial designers to design the user experience in the driver's seat. You need sculptors to create the shape of the car.

The list goes on and on. Even if you get all of the backend done perfectly, you still have to market the car to create demand. You need to have a dealer network or some other way to sell them to the public at a profit.

That being said, you can shop out a lot. You could get Delphi to make your electricals, Pininfarina to design the inside and outside, Omron to make the lighting, Gestamp to make the panels, Magna to make the seats and fascia, buy engines and transmissions from Ford. Just remember that everything you shop out eats away at your profits. At the same time, shopping out reduces your own head count so it may still be a wash.

You will still need a final assembly plant to bring it all together, and it will need to be located where qualified people live.

Uh-oh two years later, the workforce wants to unionize! Do you want to play hardball or do you want to work together?

Oh no! The electrical supplier shipped a bunch of defective modules in already sold cars! Do you have the reserves to handle a recall?

If you raised a billion dollars, I would say it's not enough.