Today, Boaty and I finished work on the 22nd page of "The Surreal Adventures of Edgar Allan Poo," Dwight's really successful webcomic creation. It took a mere two months from concept art to having these 22 pages completely drawn, colored and lettered. Since the strip runs weekly on Saturdays, that means we've got a buffer until the middle of June already.
Dwight's already scripted the first 88 pages - or the first chapter of the property. Boaty's taking 2 or 3 weeks off to work on something else (well deserved break!) before continuing on with the next part. This means with not even a month long break, we'll be back at building up that buffer very soon. Thus, the webcomic won't be in danger of suffering any delays.
That's exactly how work on a webcomic has to be done if it's just a side project for the whole team. It's only fair to the fans to not leave them hanging for even one week, and it also helps keep everybody's personal schedule running smoothly. So if you're toying with the idea of doing a webcomic, build up a buffer before going live, and then keep that buffer intact while actually constantly increasing it. The buffer is meant for emergency situations, not to rest on laurels one hasn't finished earning.