Orchestra Education Money Idea?

I am starting my own orchestra...I am 13 years old. In this orchestra, I will have 6 violins, 4 violas, and 3 cellos. This is a orchestra where I have to specially invite others to audition. I will have 12 violins try out, 8 violas, and 6 cellos try out for this Orchestra. We will be performing at coffee houses monthly and take trips. However this orchestra is a privilege. You must be a dedicated student. I am charging a $50.00 fee to enter into this orchestra. The reason being is to buy shirts embroidery with our logo and to buy music and supplies they may need. This club is a small middle school ensemble, grades 7-8, performing a variety of musical styles, with the focus on orchestral music throughout centuries. We will preform at special community events. Do you think $50.00 is fair, considering they will have a lot of performance experience, both group and individual? We would also be recording ourselves to see what we can approve on. This will be about equal to Arts West in Eagle, Idaho.