My offer:
Offer a salary match(Smart S&T, Rozier, Yabu, Morris, Nader)+ALL our picks needed to a point that beat out any other team(or at least Laker/Sixer offer) to get Kawhi
By this move you got KI+Brown+Kawhi+Gordon+Tatum+AL with Stevens riding the ship so you:
1.At the very least have a very high chance to get 1 champ next year, even if the injury bug strike again on 1 or even 2 star player, you still has 3.5
2.Pushs Lebron out of East(and Philly), knowing he can’t compete against us, at the same time stop the Lakers to form a super team,also the Warriors won't be the same after next year(more so if they lose), means there won't be any Ultra super team in our way to champ
3.LBJ and PG then almost guaranteed to go to the lakers, so the lakers can’t sign Kawhi next year, at the same time making us to have significant more chance to keep him, because it will be a cake walk to finals and at least 7:3 chance to win champ every year, thats the way you succeed either for your legay or money-endorsement , by winning, alot.
With that starting lineup and Coach you literally don’t need any draft picks, it will be more than enough to pickup minimun players/europers/ring chasers for the bench.
Even if "worst case" KI and Kawhi for some reason wont sign extensions you still have year 3 Brown and year 2 Tatum plus Hayward as big 3 plus AL(paycut) to contend for now and years to come(with no ultra super team in the league)
If KI and/or Kawhi agree to extensiton you can trade one of Kawhi/KI/Hayward or more likely Tatum/Brown for top picks to reload if you can't afford the tax after their rookie deal ends
For the Spurs:
Spurs will not get a star back for Kawhi, even if they do it will be a lesser star so they still can’t compete with Warrios/Rockets, and Pop/Parker/Ginubili/LMA don’t have so many years to Reload, so why not take as many pick as possible , with also trading LMA they are set for a great rebuild
Players like Saric/Roco means nothing but minus if they go rebuild, also will not be easy to get first rounders for them at this time
Players like Ingran/Kuzma/Fultz (who have star potential) will leave the moment they have a chance, just like Kawhi/Hayward/PG
Their only way is to draft their own stars like their big 3/Thunder big 3, and thats also why they are very good at scout/draft ,even for late rounders
They take the tons of picks from us and suck and get their own top 3 picks, hire a youndg competent coach and go the Celtic way of smooth, exciting rebuild.
Last, if King/Suns are stupid enough to offer their top pick which may trump our offer, then at least we assure Laker and Sixers can't form a super team.