Are you asking how they're going to prioritize manufacturing a car with huge margins over the low margin car?
I guess we'll never know.
Easily. The Roadster will have far fewer customers than the Model 3. They just won't have to build as many. Sure, the Roadster probably takes a bit more labor to build than a Model 3, but probably not by much.
It's $200k, so presumably the volume won't be too high.
(Which sadly means it's unlikely to depreciate into my price range any time soon!)