2019-2020 Mavs Trade Discussion + Salary Chart

[omahen]

but I don't think the NBA is going to allow the cap to drastically fall because then no team would be able to make moves.

Those news are very old and before Covid. Realistic/optimistic estimations have 2020/21 cap space at 109 due to Covid. For 2021/22 a lot depends on the next season (fans allowed or not). If no fans, cap might even go down. 

Btw, 109 doesn't mean cap is falling. It stays where it is. I guess that is great outcome based on the losses the league took.

If the Mavs traded both Powell and Wright, and renounced the rights to everyone, then they'd have 32,000,000 in space going into the summer of 2021.

I am not sure how you came to this result. Where you counting Hield in? Mavs have 84 mil in committed salary in 2021. Drop Powell and Wright and they would be down to some 65 mil. That is 60 mil of cap space with the very optimistic 125 estimation.