Suggestions for progress tracking

[Eric Abrahamsen <eric@ericabrahamsen.net>]

I'm starting another novel translation, and want to keep track of
progress in org (I've blown too many deadlines in the past). I've been
looking at the habits functionality, but it doesn't quite match what I
want, and I'm looking for a little advice here. I'd like to:

1. Set myself a minimum of pages translated per day, on weekdays.
2. Record how many pages I do each day.
3. View some habit-style report of how I'm doing relative to my goal.
4. Project when I will be done with the novel at the current rate of
progress.

Obviously I'll be writing some custom elisp to get all of this
functionality, but I'm looking for some advice on the best way to build
the basics. Habits are currently based on either/or values: "done" or
"not done", which doesn't incorporate enough detail. Properties seem
like the best way to keep track of number of pages translated per day,
but that means having a separate TODO heading for each day of work.
State logging could do it, but there are no pre-fab ways of extracting
data out of the log itself.

It seems like there are so many good tools here: the history reporting
of habits, or the progress cookies you can put in headlines, etc. But
they're all tied to headlines or list items being in an on or off state:
TODO/DONE, checked/unchecked.

Anyway, if anyone has any bright ideas, please let me know!

Thanks,
Eric