depends on the design. sometimes I can whip one out sometimes I get whipped post pic
Do you pay him salary of by the hour, what happened to your last designer, will the time he took, 5 hours, make you a good profit on the tshirts, how long did it take the last guy to get a great design, why don't you just pay him per design and if he takes 40 hours it won't bother you or your profit so much. If you have been in business for any amount of time you would know just how much something like this costs.