Writing a novel, in any month, is all about giving yourself tangible goals. If you sit down on November 1st and say "I need to write a novel" you've already failed. But, if you sit down and say "I need to write 1,000 words" or "I need to write one page" then you're on a path to success. Any amount of progress, no matter how small, will keep you moving forward. NaNoWriMo is all about helping authors kick start novels. While it is certainly an accomplishment to reach that 50,000 word total, ultimately the heart of the challenge, in my mind, is lighting a fire under our butts. You may not make the final total, but any attempts will bring you closer to a finished product. So, write what you can, when you can, even if it's only a few sentences before you go to bed. Little by little, you'll see progress, even if you aren't keeping up with the writers who don't have jobs.