> Presumably Apple could do it cheaper than Meta, since they could assume higher volume and are more valued by suppliers.

They theoretically could, but they would never do it, as we see with the Vision Pro, which is, apart from being far heavier, also far more expensive.

Depends on why you think the Vision Pro is so expensive. Maybe they just wanted extremely thick margins and to not sell many, but I'm guessing that they were actually trying. They could have called it a dev kit, but the indications are that they are trying to sell to consumers.