To be honest, I do not know anyone who relies solely on their AdSense income. I was browsing the Google AdSense forum at WebmasterWorld and found a thread named last fri. i quit my job,for adsense: need your "good luck". In that thread, the member said that he received 1 check, that check basically covered his rent. He admits he needs more money, but is willing to take the risk of quitting his day job to enjoy life and self-independence. As you can imagine there are many wishing this member the best of luck and offering him sage advice. He has my best wishes.