Per-unit margin goes down (but is still profitable per unit) but you make up in volume to create a profit.
Tesla's main costs aren't the cost per unit but the engineer/software costs iirc.
Tesla's main costs aren't the cost per unit but the engineer/software costs iirc.
This has actually been Tesla's business plan all along: start with a low volume, high-priced product (the Roadster) and gradually move towards successively higher volume, lower cost models.
Tesla is constantly behind on producing cars for its customers. They just wanted to generate money now rather than later.