Anyone who is interested in self-publishing a comic books should check out the Xeric Foundation. Here is a link by a past winner describing the step-by-step account of how he went about applying for a grant.
One important thing--if you do not win a grant the first time, submit it again.
http://www.scrypticstudios.com/index.php/articles/427
One further thing--I do not know this person or his work, and do not endorse (or not endorse) his book.
Xeric 101
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