Here's the math.
The salary cap will be roughly $58 million.
Right now, our committed salary, if you count Jeff Green's qualifying offer, is $70,285,154. If you subtract Green, it's still around $64 million.
If you subtract KG, that brings our salary to $49,038,110 (or around $43 million without Green).
To that, you have to add cap holds. For every player below 12 on our roster, you add around $490k. That's around $3 million additional (or $3.5 additional if we don't sign Green).
That means, best case scenario, we'd be around $52 million with Green, or $46.5 million without him. Also, there's a cap charge for JuJuan Johnson, that adds another $400k or so ($900k, minus the cap hold amount). So, let's say $52.4 million, or $46.9 million.
Also, to get that cap room, we'd have to renounce rights to all of our free agents, renounce the MLE, and renounce our trade exceptions.
After all that, we'd have roughly $5.6 million to spend on a free agent (if we keep Green on his qualifying offer), or $10.9 million (if we let Green go).
So, is that worth it? To ship KG out of town, burning up a lot of good will with the players and the fan base, and ending our title chances? And wasting $24 million of Wyc's dollars? All of that for $5.6 million, or $10.9 million if we get rid of both KG and Green?
I say no. Amnestying KG would be a counterproductive move.