Newsletter...

My oldest son is absolutely fascinated with hunting for monsters. He has bought books on the topic and researches everything imaginable online in regards to finding elusive monsters. Now that he doesn't have the television to watch he has decided to put his time to good use and is writing a newsletter about monsters. His goal is to get people to subscribe to his newsletter and then mail them copies of it. He doesn't understand why we can't just use an online printing service to print his newsletter. I have explained to him that the best choice would be to simple email people copies of his newsletter but this isn't good enough for him. He is convinced that their will be a great demand for his newsletter and that there is money to be made by selling print copies. How do you support a child in their goals and keep them grounded at the same time?