The most logical thing I can come up with is, is the house cleaning deal:
Brown $5,169,960
Morris $5,375,000
Yabusele $2,667,600
Nader $1,378,242
Ojeyele $1,378,242
#27 pick $1,186,300 x 120% =
SAC/19
--
x 125% + 100k
= $21,840,755
Kawhi $20,099,188
#18 pick $1,469,800
--
= $21,568,988
So then we roll with the "Big 5" of Irving, Hayward, Tatum, Kawhi and Horford.
The future salary cap if we max out both Kawhi and Irving would be crazy, but it's possible that Horford would opt-out and do something somewhat team friendly over 3-4 years and get us to something like this is 2019-2020
Hayward, Irving, Kawhi: $100M
Horford, Tatum: $30M
luxury tax line: ~$130M
So basically we'd be paying our Big 5 alone the luxury tax line for a couple of years, then we'd have to think about letting Hayward walk to sign Tatum. Something like that.