I have not yet decided what my target will be, whether 50k or 30k or 10k. I have also taken the pressure off myself a little by calling it "… MonthS" and so do not HAVE to finish it all in one month but still may aim to. I know what I am like. If I set a definite deadline and target I will talk myself out of being able to do it. If I don't set them then I might do twice as much in half as much time! Also, this way I am less likely to just give up if I get ill.
1 e.g. Kaz Mahoney who is doing 30k instead of 50k because she is a writer and has other deadlines.