Cheap ways of printing on to iPhone cases?

I have recently started a small website in order to make a little bit of money- I do however need to print on to iPhone cases at home (and hopefully later on t-shirts/mugs). I have heard about sublimation, however this method is TOO expensive (i.e having to buy ink, heat press, printer etc.). Please Help. Examples of what I'm printing @ www.jazzypattern.bigcartel.com )

Have you tried the website skin it?

http://www.skinit.com/

I love this website. You can pick so many different designs! It's awesome. I don't believe it's to expensive either. Every skin it I have ever bought was a true fit.

You can buy a clear hardshell phone case, print out your design & cut it to fit