Hello,
I am much interested to work on your Teespring clone for wordpress project. I will provide you all features like admin dashboard, create products through customization of canvas items, payment processing, manufacturing and shipping, etc.
In the past I have worked on many wordpress, woo-commerce, html, css, graphics design, web design projects with E-commerce and different different complex projects according to customer requirement.
Lets schedule a small discussion on chat so I can share my best estimate and solution.
VJ