You need to order 100 transfers, not 5. The setup costs are the same regardless of how many you order, and that dictates a minimum cost for the job. Plastisol transfers are screen printed, so a screen has to be created and setup for each color. The more colors the higher the setup costs. The fewer number of prints, the fewer prints to spread that cost across. If you want inexpensive transfers, keep the number of colors low and the number of transfers high.