Then they need to spend the money to bring in the quality players that they promised TD they would do, whether with the MLE, LLE, and through the draft and via trades. Unfortunately outside of the big 3 and Bruce, Ime, Brent, and Kurt, the Spurs have really nothing to offer that any other team really wants that is good trade fodder. They do have the Beno exception however and some 2nd round draft choices to barter with.
My point is that Now, not later, is their window of opportunity as far as Manu and TD are concerned.
Their only constraint will be the rules that apply to what a team that has exceeded the Max can and cannot do regardless of the Lux tax.
Holt always maintained that the Lux tax was not really a consideration, yet moves, and non-moves, have been made in the past which show that it has.