I think he would be perfect to replace Manu in the future. Maybe the Spurs can lure him with a 2 year deal (PO in 2nd). He is strongly considering going back to Europe and he just might stay for a shot to play with the Spurs. If he works out, the Spurs can pay him next year and he can take over for Manu full-time.
And yeah, with the Cap going to 70mil, the Spurs don't have to use the Room Exception on Manu. They can resign him with cap space if they renounce Bonner and cut Williams. They can always resign Bonner at the Vet min.
Knicks only have to the room to offer Shved. So maybe the Spurs can swoop in and make him an offer.