Colin, thanks for your kind words, and for reinforcing some of the ideas about this topic. I have not kept track of my hours, but I might spend an average of 3-5 hours per week administering Moodle, and 10 hours a week teaching with Moodle. I spend most of my time creating educational content for the courses that I teach.
Yes, there seems to always be some things that require additional attention, such as when courses don't restore correctly, but that is just part of the overall job. With Moodle, at least there is a community of supports who will listen and try to help.