While I've never written a comic book, I've used a lot of the ComicBookFonts fonts for things like presentations, diagrams, and even legal presentations. Every year they have a massive sale on January 1 where pretty much everything is a penny per year, making everything this year $20.18. This is a significant savings with some of the fonts costing in the hundreds. If you're looking for something to get started, I'd recommend Hedge Backwards or ComicCrazy