Can a flying character choose to fall, and then use a reaction to stop falling before hitting the ground?

As a flying character there are a few scenarios that I’d like to know are valid/RAW, invalid, or up to the DM.

Assume in these scenarios that all characters fall at 1000ft/round (this is not up for discussion (no matter how strongly you feel about it) as my DM has made this ruling.) Also assume the fall is intentional (on my turn/not done by an enemy or enemy’s turn).

  1. Fly at 1,005ft, fall (drop prone?) in 1 round (1000ft), next round recover (stand up from prone), land safely or continue to fly.

  2. Fly at 600ft, fall, to 60ft recover to fly normally.

  3. Fly at 600ft, fall, to 60ft cast feather as a reaction to falling. This scenario could also include carrying a halfling (600ft), then dropping her, and she can cast feather fall (as a reaction) 60ft before hitting the ground.

Feel free to add additional cool scenarios that could work. Or if a scenario doesnt work, what would be needed to make it work.

If possible please use citations, especially if any of the scenarios are invalid/against the rules.