Producing a bunch of units is a small part of the system cost. Starships will need to be inspected and refurbished between flights (high personnel cost). Launch

Producing a bunch of units is a small part of the system cost. Starships will need to be inspected and refurbished between flights (high personnel cost). Launch sites need infrastructure to support that launch cadence as well. That means clean room storage, fuel production/storage, housing, and adequate roads/rail/ports for surface transport. Launches also have regulatory requirements like clearing of airspace and potential downrange landing areas. Their own deliveries of fuel and client payloads will be delayed from the airspace and downrange surface exclusion zones. Once you've got vehicles in space you'll need 24/7 monitoring and management. Even if mission control teams are relatively small the only way you'll be able to safely manage a large number of missions will be with a large number of teams. The personnel and infrastructure costs will put a cap on the number of Starship launches SpaceX will ever be able to manage. The costs of those will push up the costs beyond Musk's low-ball fantasy promises.