Am I being pricey or smart? I don't want to be sweet but dumb!

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Ok, so I take these classes that teach specialty topics like handwriting and phonetics and stuff. I am very dedicated and hard working, and have been very successful at accomplishing results in every case. Now when I started out about a year ago, I was very flexible and would even sit 1 on 1 and teach at no extra fee and basically I ended up working 7 days a week and many batches had as low as 1-3 students so I was working on back to back classes and commuting and walking and basically having a raw deal. You can imagine I was not earning much because of the numbers per batch, but I wanted to see if I could handle this line of work and also it was to prove to people what my potential was. Now I am gearing up for another year but this time I am insisting that I need a particular batch size and if anyone wants a small group or individual attention, they will have to pay extra. Am I shooting myself in the foot and will this actually slow down what was moving on or is it the wise thing to do as I really need to see more money come in for the kind of quality and effort I offer. Please give me your sincere and honest opinions, mylotters!