Water changes didn't seem to slow down my cycle at all. Lasted 27 days. Then again I cycled with a few damsels. If you don't have any fish in the tank I don't think I would bother. Save the salt mix.
But then again, and there is always a bug but in this hobby, I think another benefit of doing water changes during the cycle is that you not only end up with zero ammonia and nitrites at the end but I also end up with nearly zero nitrates when the tank finished up. IMO once nitrates gain any kind of "foot hold" they are nearly impossible to knock down around the zero level there after. Good luck on your new tank.