I don't know about that. They can either attempt to trade Perkins for nothing (aka heavily protected future 2nd) to a team with cap space or amnesty him, not qualify Maynor and let Cook walk. They can also come up with a creative ways to structure Harden's and Ibaka's contracts. The end game would leave them with four big contracts, two relatively minor contracts to the other two established players (Collison and Sefolosha) and the remainder of the roster fleshed out with players on either minimum or rookie contracts (Aldrich, Thabeet, Jackson, Jones, etc.) If they can pull that off, then they should be able to get away with the aforementioned players playing more prominent roles and perennially contending.
Ibaka/Collison
Durant/Jones
Aldrich/Thabeet
Sefolosha/Harden
Westbrook/Jackson
Looks like a perennial contender to me. Keep in mind, they'd always have the veteran's minimum at their disposal (and because of their situation, they'll be able to lure veteran's who are worth more than the minimum). They could use a 3D SF, which would free up Jones to play PF, keep Collison as the primary backup C and just use Thabeet for the Howard's and Bynum's of the world, which is probably their plan anyway.