Elon Musk has stated that launch pad/landing tower complex is just as important and difficult to build as the rocket. And that building the manufacturing factor

Elon Musk has stated that launch pad/landing tower complex is just as important and difficult to build as the rocket. And that building the manufacturing factories and the processes to build one rocket a week is even much harder. Having the factory and launch site at the same location is a huge plus especially given SpaceX's philosophy of quick iteration.