What Frog said. Clerical time alone is worth more than what people will pay for a 1-2 shirt order. I only do those sorts of things as favors for people I already know (friends, relatives, and customers who normally order big). Then, I (and they!) know I'm not making money, and just charge to cover material costs. Even with this, I generally will only do 1-color screen print, or full-color dye sub (outsourced transfers). But for regular customers- no. I don't think anyone wants to pay what that time is really worth.