I didn't find craft fairs very lucerative. I've focused on clubs and music groups like choirs and bands. If you can get an "in" with the spouses of a senior (like over 70) team, they are good customers. I've gotten some school music accounts by offering a gift of a personalized shirt to the music director along with my price list. I offer free logo design and digitizing with a group order. I've never specified the size of the order but have never had an order for less than 12 and some as large as 400.
Donate 10 embroidered shirts to school auctions. I offer a simple, 2 color logo on t-shirts of my choosing in a color we agree upon. (10 t-shirts at wholesale are going to cost about $20). In every case I've gotten an "upgraded" order to more expensive shirts, more colors and more shirts.
Focus on pricing. It may seem exciting to sell 25 towels, but if your profit is only $3 each, that's a lot of work. It would be better to sell 3 stadium blankets at $35 each with a $25 profit.
Get a biz license and resellers permit for your state and set up wholesale accounts. Many places do not require huge minimum orders. Sanmar is very good for shirts, hats and bags.
I've heard good things about Melco machines and the support. I see them many places, too.
Go for it! :thumbup: