I am sure it has been done with less, but you should be prepared to write and throw away a million words of finished material. By finished, I mean completed, done, ready to submit, and written as well as you know how at the time you wrote it. You may be ashamed of it later, but that's another story.
Jerry PournelleMicrosoft has gotten so big that it can put out a Preview that will install itself without checking first to see if it has expired. The message here is that Microsoft's time is worth more than yours.... no start-up company could get away with being that arrogant.
Jerry Pournelle