Perhaps there are existing plants that they can easily convert. Besides Trump is known to move mountains pretty darn quickly when necessary.
No. Production lines are a very specific thing - As are the supply sources and lines that feed them.
That won't be a refit campus. That will be scratch built to order. Even if the plant were standing today, moving the thing would take a long time.
And it ain't Tumpy that's gonna do it. It's Rolls Royce.