yes, pretty much
Not in my opinion. Maybe for half that much
spoiler: they won't
that's what we should be doing anyway, no need to keep them around at that price while we do it (I would not expect any performance drop from Dupree to, say, a 3rd-round rookie)
why not find them now. For $13.2M, we'd need to find a below-average player and a league-minimum guy. Not a tall order.
Or better yet, just draft a guy in the middle rounds to replace Dupree and sign a street free agent instead of Chickillo. There, same talent level and production and you have $12M to go find something else you need.
The salary cap was explicitly designed so that you have to release players like this.