There are a lot of moving parts here so instead of giving a breakdown for each team, I will share the overall picture here of why this makes sense, even though it will be close to impossible to pull off.

Portland, Spurs, and Nets stay under the tax while the Spurs still have 30 mill (possibly more) to sign a free agent to go with the new additions of CP3 and PG13. Portland gets tons of draft picks in return for all of their veteran talent (selling high). Nets try and win now as they don't have any of their draft picks for the next few years. Warriors and Clippers both avoid the second apron. Warriors get to keep all of their young talent, except Moody, and land Grant, Claxton, and Thybulle which will undoubtedly make them better over the next two years as they go for another championship. Clippers aren't willing to pay PG13 so they move him for a ton of depth pieces which will keep them in the hunt in the western conference.

Feel free to ask away. The Clippers and Warriors are both at full rosters while staying under the second apron and the other teams maintain flexibility going into the season.