Wants to Patent T-Shirt Designs

I need to know how to get my designs patented. I just opened my own online t-shirt business and I have 300 designs so far and want and need to protect them all? How do I get started without spending a lot of money? Hey, what do you think of this idea? It's for people who only want to do laundry once a year? You sell 365 t-shirts, each with a different day of the year! It could even be a subscription thing, so if you just wanted to do it once a month, you could just get that much at a time? You can use the idea if you want because the Dear Rich Staff has a million of 'em!
Right, you had a question. First, you don't want to patent your t-shirt designs. Utility patents are for inventions and design patents are not intended for the appearance of t-shirts. You can read about the differences here and you can learn more about design patents, here. Second, you're best protected by copyright. If you don't want to spend much money, don't do anything. You get copyright automatically once you create an original design. If you want to register your most popular designs, you can do so online for $35 by following the instructions, here. Copyright registration provides benefits but is really only required if you are going to sue someone for infringement.