I'd be fine with #9 and Henderson for Young.
That trade only takes up two of the $20 million dollars we have in cap space.
Here's just a mock team
Sign Kirk Hinrich for $6 million, Lance Stephenson for $10 million
Re-sign CDR and Tolliver
Kemba Walker, Kirk Hinrich (sign), Russ Smith (draft)
Lance Stephenson (sign), Jeff Taylor, Gary Neal
Michael Kidd-Gilchrist, Cleanthony Early (draft), Chris Douglas Roberts
Thaddeus Young, Cody Zeller, Anthony Tolliver
Al Jefferson, Bismack Biyombo, Brendan Haywood
I know some people aren't a fan of Stephenson but he's the best shooting guard available and with the right coaching he should be fine.