@PotomacBobI suspect there are other producing more, but I'm not personally a big fan of stories written in serial format so I don't really keep track of output like that. Aroslav, at least, goes back and edits some of his stories once they're completed so he can publish them in a format that's more similar to a novel.
As for you WIP project, I'd recommend that you either set aside a certain amount of time each day or a certain number of words you want to write each day and then keep to that schedule. Also, keep track! This is exceptionally important. Even if you're the only person who ever sees the list of writing times, just the fact that you're keeping track will help you stick to the schedule.
Don't worry about whether every word is perfect or if you want to edit things later, the point is to build and keep to a schedule long enough that it becomes a habit.
You shouldn't have too much trouble writing 500 - 1000 words in under an hour. If you do that every day, you've got two full-length novels in a year. Granted, there's a lot more work to creating a novel than just putting words on paper, but my point is that you're overthinking this.
If you want to be a writer, the most important thing to do is to start writing. Everything else comes after that.