I once started a t-shirt business in Italy with some friends. It was hard and by the time we were done we made only a little profit. We were doing t-shirts and

I once started a t-shirt business in Italy with some friends. It was hard and by the time we were done we made only a little profit. We were doing t-shirts and sweaters, based on some 70' italian b-movie. You could go to some local distributor for t-shirts, starting from brands like Hanes, and then take it to a company who can do the printing and tagging. Basically print or stitch your graphics on the clothes and then replace the original tag with your own ones (that of course you need to get printed somewhere else).