I have experience with graphic design as I was brought up in the printing industry. So making my designs are simple. That's why I got in this business - to get my ideas on t-shirts and sell them...
But to answer your questions, it can get expensive for some people. A friend of mine and his uncle opened a screening shop from their garage and asked if I can do some designs when they're asked to. I agreed to do it at half the price ($25) their were going to be charged at ($50). But again it all depends on what it is you want. The harder the design, the more time it takes to make and therefor more money.
Hope this helps...
But to answer your questions, it can get expensive for some people. A friend of mine and his uncle opened a screening shop from their garage and asked if I can do some designs when they're asked to. I agreed to do it at half the price ($25) their were going to be charged at ($50). But again it all depends on what it is you want. The harder the design, the more time it takes to make and therefor more money.
Hope this helps...