Crazy sales by me or how to be a saleman

A week ago I made a crazy sale for a special promotion class. I am embarassed to say what it was, but I will. I made a program for uni students when they come for two hours every day for three weeks and pay us only 220,000 won (read peanuts) . When I was making this program I actually had in mind teaching groups of students. Then comes a student who needs a class and, Oh generous and slow thinking me, I sell her this program. This means me and her two hours every day, five days a week, three weeks long. I am not exactly sure what was going in my head when I made a decision to accomodate only one student for this program. I had a moment of panick after I realized what I did, but it was too late to back up. My word was given, I keep it even when it causes us to loose money. I screw up; I will fix it. I made a note in my head not to make such crazy sales anymore, and stop being such a helper, otherwise i will never make any money. Right now we are making just enough to cover our rent and utilities for the school, and living off whatever savings we had so far. On the positive side, my lonely student is great; she is fun to talk to and in general be around. She studies in Japan, so is not your average dependent Korean youth with no personal opinions or attitudes.