Hosting

A major aspect of a webcomic is where the thing's actually going to be stored. A comic around the size of a daily newspaper strip takes around 20-50KB depending on format & colors. Luckily most web hosts now commonly provide 100MB of storage space for almost nothing. Provided you don't go crazy on hosting fan-made or related artwork you should be fine. The real trouble comes with bandwidth.

Consider a young comic: 1 full-page (100KB) updated twice weekly, which has been running for half a year. Just for the comics that comes to 800KB per reader per month (100KB x8 visits/month). With a really basic web host you could get around 512MB of bandwidth each month, so with the above example, at most 655 readers can access the comic. If I come around, I'm going to read the entire archive: that's around 5MB right there, and about 6 less regular viewers possible that month.

And that's just counting the comic. This page you're viewing now took around 8KB including the CSS file (50 fewer readers in the example). Logos? Buttons? Vote Incentives? Banners? Each one tacks a few more Kilobytes onto the total (An effective browser cache will reduce the costs for unchanging files). Who knows how much more bandwidth you lose when people link to you, or hotlink your images.

If you (or your techie-guy) aren't ready for that, there are a number of hosting services dedicated to webcomics, but those have to wait for next week's 250.