Depends on the procedure they ultimately decided to use for the prep.  Originally the the shuttle main engines had to be taken apart, with every part inspected before the next launch.  If they have to do something like that there&#x27;s not much point.<p>But if they can get it to point where it&#x27;s a matter of gassing it up for the next flight, that&#x27;s a huge savings.  Fuel is a few hundred grand for a rocket that costs sixty million dollars.  It&#x27;s nothing, basically.