For this type of operation I think asking about the material cost isn't very useful considering how vertically integrated they are. They're still paying the wor

For this type of operation I think asking about the material cost isn't very useful considering how vertically integrated they are. They're still paying the workforce whether the test happens or anything is built. The input raw material is pretty close to "free" as it comes in as giant rolls of sheet steel. I think the issue you seem to be missing is that the marginal cost of materials that go into building a rocket is very low. The fuel cost is similarly a small percentage of the cost of building a rocket. The cost comes from the large workforce required and the low flight rate.