Aikido is a tough art to master (those that say it isn't clearly aren't there yet), even tougher is to teach Aikido and run a dojo/ organisation.
For managing risk, insurance and children's issues see (12 Managing risk, insurance etc ) which were written for our national association. You may also find 11 Hosting Seminars interesting a a shared wisdom on etiquette and tedious things like budgeting ted.. helpful
See also Aikido as an Elite Sport, Reflections on the Aikido Yuishinkai Syllabus)
If your looking for Aikido techniques try here Aikido articles by topic technique