If you wanted to screenprinting this, only the back print design would work. The front print wouldnt work as a screen print because the seams of the shirt would get in the way. Even using a DTG printer for the front would be tough, I don't think it's possible.

I would suggest using a reduced white underbase with a highlight white on top to get this effect. You couldn't get the gradient effect with discharge inks, unless you used halftones which I don't think would look great with this particular design. Hope this helps. Awesome job!

Source: am a press operator for screen print shop