What rebuild? They haven't made finals. Their best players are fairly old. Riewoldt, Montagna, Armitage. Only have a sprinkling of good mid career players. Josh Bruce, Jack Steven. Then a lot of unproven youngsters.
I'd look at the Bulldogs as a guide.
Other than some good drafting and trading decisions the biggest step in the right direction for the Bulldogs was to sack McCarthy to get Beverage a bit like us with Harvey to get Ross. I'm not entirely sure that the Saints got the best that they could get in Richardson but hindsight is a wonderful thing I guess.