I can do the work, but what worries me is this line:
DPI: I am unsure, I will check with the printer as soon as I can, but do what is reasonable to you (I say 800 is fine) if we need to adjust it we will.
I'm worried that you don't really know what you're getting into. There's no way you can print at 800 DPI on a t-shirt, printing on glassy paper is typically only done at 350 dpi.
Also, there's processes for printing on coffee mugs and tshirts and things that are a lot diferent from printing on paper. These things are silkscreened on, you have a liited number of colors, and a different pallette than you use on paper. Actually, I know from experiece that there are very few people on here that have any expierience designing anything to actually be printed. Most people do low-res, RGB, bitmapped (not the .bmp format, but just any image made up of pixels) graphics that do NOT print nicely.
Also, you need to be a bit more specific in what you want people to design. If you want my help, PM me, I have several years expereince as a graphic designer for print.