Evans' cap hold until he's resigned is $13.1 mil.
The salaries of Marcus Thornton, Cousins, Fredette, Patrick Patterson, Jason Thompson, and Isaiah Thomas pushes those commitments to around $38 mil.
There are also cap holds for James Johnson, Cole Aldrich, and Toney Douglas to consider. But I think none of the three factor into Sacto's long term plans. Let's assume all three are released.
Trading Salmons, Hayes, and Outlaw for Pierce, and then waiving Pierce, would bring Sacto's commitments up to $43 mil, I believe. That leaves them with a lot of cap room to help retool the roster and put a legit third banana next to Cousins and Evans (or whoever Sacto brings in to replace Evans).