Remember that the mechanical noise itself is only one factor tho. Screams are another.I'd wager that this would likely be a more family-orientated, and by extension less extreme, coaster than any of the current SW rides, so it would likely make less noise by default, thus would require less isolation to make quiet.
Not saying it's impossible, but it's not trivial to eliminate sound. Black Hole was enclosed but still emitted a rather lovely roar almost constantly.
It was noise complaints which prevented Coaster Corner from getting proper planning permission AIUI, hence it closing and not being used again.