I like it, Jeff. Nice thinking.
If I'm just being candid, I'd even do the deal without Porter. Problem is his salary is needed in the deal -- especially considering both sides are up against the tax. The rest of the options on their roster don't really work for one reason or another.
For the sake of argument, if the Wiz wouldn't give up Porter, and you waited until 12/15, the trade could be:
WAS gets: Green, Bass
BOS gets: Ariza, Vessely, Singleton, Harrington, Temple
The Cs need to cut Brooks and either Humphries or Bogans to make the deal (whichever they feel they'd be less likely to need in a potential trade at the deadline -- probably Humphries -- maybe they could even buy him out).
In that case, I think both teams still squeeze under the lux tax.
I'm sure this would be unpopular here, but i think a pure salary dump of Green & Bass is perfectly logical for the Cs. the top asset they can trade for right now is flexibility.