I don't think that's necessarily the case. For advanced R&D projects like this, it's super difficult to capture all the processes and knowledge the first time around required to build it a second time. I think it would probably be cheaper and faster, but not by such a large amount. Also, given the timeframe of this project, I would estimate that many of the parts may be difficult to obtain again.

There's also the fact that for projects like this, so much is learned along the way that you probably wouldn't even want to build it the same way again, having found better, more efficient, cheaper, etc. ways of doing things.