like Intel's chips?
Obviously they hope to amortize R&D over a large number of launches - that's the whole idea. If you're suggesting they're pricing below marginal cost, well, I don't think anybody can possibly know what that is yet, but from what I know of Musk, he does NOT plan to raise prices later; rather keep them heading down.
Many businesses run at a loss for years to become successful - business is all about taking risks like that - unfortunately our aerospace giants have forgotten what normal business is all about.