I want to start a small shirt business. I design the shirts, 'they' (who ever they are) make it, and I sell them. I found a nice niche which I have over 5 years experience in, first hand. I tried to find shirts related to that niche, and didn't find a store that caters JUST to that niche. So I'm wondering if its profitable to get into it. Or like.. how can I know if it'll be something that people will like?