Students per class

I live in a very warm part of the country and although I have had classes of 2-3 students, one is the norm. I really don't understand the reasoning behind not holding a class for the one person who is interested in learning. That student will be purchasing yarn and supplies, plus additional books and patterns as they move on to additional learning. If I am willing to teach one person at a time, I can't see where it would hurt the store to allow that one person to learn at his/her own pace. I normally plant seeds as to what they will be able to create by signing up for additional classes. Do we really want to make that one person unhappy and delay their learning? Isn't this a sort of shooting ourselves in the foot, sales wise???? And, they may get discouraged and go to another store to learn where they will purchase their yarn and supplies.