That's 10 a day. You can pull that off just fine while running a life elsewhere. Many will have long commutes, lunch hours, nothing to do in their conventional job, or be insomniacs. And it all depends on how interested you are. If you're forcing yourself to come up with that content you could waste hours staring at a blank screen. If you're fully engaged in a subject the responses will flow.
I do find this attitude weird and interesting. The inference from some posters is that it somehow smacks of low morals to be paying for your existence through here rather than screwing the tops on salt shakers in a factory somewhere. It sounds like a great idea to me if you can keep it working for you.
Same goes for the hours you keep. I usually go to bed between 4-6am and wake up 10-12 ish. If you mention to people that you're tired because you woke up at 9am they go fucking ballistic. When you wheel out your white board and point out in exceptionally large numbers that 6am to 9am is a scant 3 hours they still think you're a bone idle piece of shit even though they were in bed at 10 and woke up 8-9 hours later.