It's no joke man. 1k word chapters each day, rough draft quality is most definitely aggressive.

But I think feasible if you're working from an outline, and you have some form of external accountability / incentive.

It may be possible to hit 1k words in an hour or two of work, but the hard part is the discipline to make it happen each day.

For sure Fitzgerald didn't write all of his books in a year, but I think taking project iterations seriously is a useful practice, and this has the potential to be more profitable for her in the long term than taking up ghostwriting, etc.