Yiiiiikes.
Crowder alone is arguably as valuable as Love due to his incredible contract. He's locked up for four years at $7m/yr. Love is also locked up four more years, but for $23.4m/yr. Is Love really better than Crowder + a $16m FA? Then you add AB, who is under contract for 2 years, $8.2m/yr. Is Love really better than Crowder, AB, and a further $8m in cap space?
Then you add the #3 to boot.
This is the kind of trade that I would make if Durant said he would definitely come to Boston, i.e. you aren't trading for Love, you're trading for KD.
I think a package of #3 + AB should get it done with a third team involved, and possibly even less, e.g. AB, Olynyk, Rozier, #16, #23.