One thing that hasn't been mentioned by anyone..........list sewing skill level in your flyers.--Beginner, Intermediate, etc.
I volunteered to teach a group at church how to quilt--it was a year project, we meet once a month and they had a finished table runner when we were done.
The one problem I found was that not everyone who wanted to learn to quilt had even basic sewing skills. One gal brought what was basically a toy sewing machine. Now I'm willing to help anyone who wants to learn, but she did not have any basic sewing skills what so ever. It made it hard to move forward with the class as a whole.
It will be easier since you are thinking one on one teaching, but an idea of their sewing skills will help you plan the lessons. Ask them if they have sewn before and if so what have they sewn. Someone who has made even a couple of small things will understand your directions and be able to follow them better than someone who's not really sewn anything.
Just my 2 cents worth! : )
I hope your venture goes well for you! I'm all for making money at quilting!!!