If he gets the designated veteran Max he could pull down $37 million in 19/20 on a cap of 108.
Add Fatty and stretched Pau, LMA, White, Murray, and 18 and 19 first rounders (picks 25 & 25 for instance) and that leaves $23 million in cap room with just those players and roster charges. If they don't sign Bertans, Parker, Forbes, or MLE players and such next year of course.
The super max is really primed to screw the Spurs, but combined with Mills and Pau it is murder. $15 million that year for Mills and stretched Pau, what a disgrace.