How much money do novelists make, on average?

I'm considering quitting my day job to become a novelist. Really. (I want to start an MFA program.) I'd like to know how much novelists make. Not the Michael Crichtons and John Grishams of the world, just novelists who get published and have readers but are not extremely well-known. Is this enough to... show more I'm considering quitting my day job to become a novelist. Really. (I want to start an MFA program.) I'd like to know how much novelists make. Not the Michael Crichtons and John Grishams of the world, just novelists who get published and have readers but are not extremely well-known. Is this enough to live on? Should I find myself a sugar daddy? Should I prepare for debt? Can I hope that I will make enough to live comfortably on at some point in the future?
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