Passions...I've got one. Now what?

Here is my dilemma: I love to write. I fantasize daily about quitting my full-time gig and just writing. Writing while listening to my favorite music, no less. But then reality kicks in and I remember the mortgage, the need for food and clothing. It would be pretty hard to use the desktop w/out electricity, not to mention cable and the internet. And how could I forget the darling Diva in Training? I swear they are pumping the school lunches with these serious azz growth hormones, 'cause every time I look around I am buying new clothes and shoes for her because she grew two inches overnight. So how to pursue my passion while meeting my daily necessities? I blog, journal, and get a few pages in while working for "the man". And let us not forget the occasional powerball ticket. Somebody has to win. Why not a wanna be writer?