I have a great experience in designing T-Shirts, Banners, Flyers, Vector Art etc. please visit my profile and have a look at my portfolio. i work on graphics tablet so most of my work is hand drawn and so is unique, mostly i use adobe illustrator and CorelDraw software for my artwork as the are the best for printing t-shirts. the time depends on the kind of designs needed. Please discuss the details with me before hiring so that i may tell you the approximate time it will take me to design 50 t-shirts.