I think we don't yet know what the rebuilding of the production line for the RS-25 will cost. They did promise quite a bit of cost saving because they need not

I think we don't yet know what the rebuilding of the production line for the RS-25 will cost. They did promise quite a bit of cost saving because they need not be reusable anymore but as you probably know better then I setting up a completely new rocket engine production will not be cheap.