IIRC, he would count for his BYC salary for our purposes, but the full salary from Boston's side. If Ant signed for 24M, let's say, he would count for roughly 12 million on our side and the full 24 on Boston's side. Brown is owed 27M, so it works for Boston. For us, we would need to clear 12M of capspace to make the deal work, which is do-able, assuming we give up the TPE.
Another way to do it is add Bledsoe on our end, and Boston adds Theis on their side.
From our end its 30M outgoing 35M incoming.
From Boston's side its 42M incoming and 35M outgoing.
Point is, there is definitely ways to make the deal work.