Under my assumptions, K. Martin, Jack and Aminu would come off the books for about 20m
You're right, I forgot about Martin and Jack's deals expiring. That would have been a really smart move to bring them in, help us win a few games while raising our draft position/eating into Rivers's playing time, then letting them walk before before our young players start taking the next step. A much better idea than having a pair of 24 year old big men on great contracts for the next 2 or 3 years.
Don't forget, the team has 18+ in dead space this season.
We have $18m in dead space because we traded Okafor and Ariza for Lewis, which you said was a bad move that you wouldn't have done.
Plus we can probably sign the elite Jarrett Jack this offseason if we wanted to anyway. He's a FA and GS is already in the tax for next season.