How long is your string Balance
When you are getting paid by a hourly flying rate, you never seem to have enough students.
When you are getting paid by a wage, then you always have too many students
I work for a college that trains airline cadets. All the instructors have up to 6 students each. I personally feel that this is enough. The instructors only have to fly approx. 20 hours a week. So in a forty hour working week, the students get plenty of one on one time (breifing, debreifing and theory, plus approx. 13 to 14 flying hours a month.)