Printing method preferred for 10+ locations, minimal color

I want to print t-shirts for a new clothing line. Each t-shirt design has 14 small drawings that are relatively simple (just black outlines) that cover the front of the shirt. About 2/3 of the drawings are colored in with a single color. In total there are 2-3 colors per design in addition to the black outlines. I need about 50 of each t-shirt design. Which method is better/more feasible/cheaper for this kind of design - screen printing or DTG? (I will not be printing them myself.)

I am new to this site and t-shirt making so any help would be greatly appreciated!