What is the maximum cash a fan can spend on your band in one year? (Assuming nobody buys the same shirt three times.)
How much of that is profit?
Now, how many fans must you have to:
-Work only a part time job?
-Become a full time musician?
-Drive a limo into a swimming pool and not care?
What happens to your profit when you introduce one additional product a year?
Makes you think, doesn't it?