How long should a successful rebuild take?

If the Saints waist draft picks in the 2nd round like they did with Foske, the rebuild could take awhile. At the moment, there are so many holes to fill you don't even know where to start. Should it be QB, DE, WR, etc, etc, The list of needs is numbing. The organization has been spiralling downward and it's disheartening to watch. I have no clue on the years it will take to fix. Trying to be optimistic but until the organization finds the right coach and QB again, it could be a bit before we see the Saints in the playoffs.