My theory:
We are trading Brogdon and draft capital to the Hornets for PJ Washington in a SnT. This will include a wink wink deal that the Hornets will buy out Hayward, who will then sign with the Celtics.
If we did a S&T to bring somebody in, we'd be hard-capped at $172,346,000.
Right now, our payroll is $177,459,126, along with around $2 million in unlikely incentives. So, around $179.4 million. I think we've also got another roster spot we have to fill, so let's call it $180.5 million.
Dumping Brogdon's salary would bring payroll to $158-ish million. So, theoretically, we could give Washington a deal of around $13 million in your scenario, and could bring in a bought out Hayward.
But:
1. Why does Charlotte want Brogdon;
2. If Washington will take a MLE-ish deal, why doesn't Charlotte just keep him;
3. Is White / Pritchard a good enough point guard combo?