All documentation should be this personal ;-)
""" Updating all of your sites each time Drupal Core has an update, as for example from version 8.0.0 to 8.0.1, is done more easily with a multi-site setup, because you only have to update a single set of Drupal Core files in one codebase.
News flash: I just watched the video recommend at this page top, and I learned something new; just now. Whereas manually updating Drupal, including the backup first, takes me an average of an hour per site, if I were using Drush the update process would take less than 2-minutes. So, actually, learning Drush might be a better use of my limited time on this Earth, rather than pursuing this right now. Sorry to bail on you. """