Regarding Portland, whether they're willing to pay the tax or not, they have no flexibility if they're capped out with a mediocre roster. They are reportedly willing to move a pick to dump some salary, though they'd prefer it be one of their later picks.
Edit: here's an article that says as much...
https://basketball.realgm.com/wiretap/246097/Blazers-Willing-To-Attach-First-Round-Pick-To-Dump-Salary
Edit: here's an article that says as much...
https://basketball.realgm.com/wiretap/246097/Blazers-Willing-To-Attach-First-Round-Pick-To-Dump-Salary