We would have like 8M or so, and I wouldn't bet everyone continues in the roster if we add someone in the free agency. You have to think that we also have a draft pick. If we, for example, draft a SG in the draft and add a big in the off-season we may put Scott or Bazemore in the trade block. There wouldn't be minutes for everyone.
Korver-DraftPick
Carroll-Thabo
Horford-Millsap
FA-Muscala
If we found a team for Bazemore or Scott, we would have +10M for one player, which is a considerable amount of money.