If it helps frame the experiment, pretend Commissioner Adam Silver sent secret memos to each of these teams saying the NBA was going to institute relegation, and that they had to make one trade to avoid getting sent down to a hypothetical lower league reserved for lottery teams.
These hypothetical trades will take place once the league year flips, using 2020-21 salaries.
We'll match money and make the deals as close to cap-legal as possible, given the uncertainty surrounding next year's financials.
And just to make things even more interesting (and probably harder), we'll make a rule against trading more than one draft pick.
They don't need to make any trades to put themselves in playoff position next season.