Trying to inject a little reality here -
You cannot go crazy with colors on something like this (generally speaking). It will make a significant difference in the price, and in fact I wouldn't be surprised if Ping or whomever limited folks to one color or maybe two.
Also, as a t shirt printer, I can tell you that the more cluttered a design is, the more the message gets lost.
If people are really interested in tons of colors, I can probably get a bag tag done, and it may be possible to do process color designs on those (but again, at a significant cost difference v. 1 color).