Got talking to Lulzbot. They recommended OHAI-Kit.

OHAI-KIT is a web application using the Django web framework. It's a comprehensive, accessible source for putting together your newest piece of machinery. Aiming to create clear and concise instruction for optimal assembly, the OHAI-kit features step-by-step instructions, illustrative pictures, and thorough check-point to be sure all steps have been covered.

It's really good. Example here.

Source is on github or Phabricator.

Would be useful for build instructions, which, might not be a priority but it's certainly something that should be on the site ideally. The lion-share of the battle would be photographing procedures, but if a little bit at a time was tackled we'd get there in the end.