I posted this to another thread, but...
Sign Hayward, and trade 2017 #1, Crowder and Smart to New York for Porzingas and filler. Its a major overpay, but this works for the C's on many levels.
Except if the Celtics have any plans on winning a title within the next 15 years.
There are two windows. Now, and 5 years out.
You are not going to beat the Warriors and the Cavs in the Now window unless you can exploit the only weak points they have. You must have bigs that they cannot match up against or exploit. Both GS and Cleveland have smaller, quicker big men that kill us now.
You can count on one hand the number of big men in the league who can do that. Porzingas is simply too big and too skilled for Draymond Green and Tristan Thompson, especially when teamed up with Horford.
We wouldn't have to pay Porzingas major money until Horford's contract is up. This means we can keep Avery Bradley, who is essential for competing against Kyrie Irving and Curry.
Porzingas gives you elite rim protection, and he moves his feet well enough to hedge and recover. He also can shoot and make plays that fit our offensive philosophy.
I see no reason why we can't compete for a title by adding Hayward and Porzingas to the team we have now. Our smaller, but much quicker guards have been difficult for GS, and if we combine that with adding Hayward and an improved Jaylen Brown, plus a huge, very skilled frontcourt, we have a real chance.
For the 5 year out window, we also still would have Brown, the Brooklyn 2018 pick, and all our other younger assets, and Porzingas would still be only 26 years old.