Mobile Bartending in dallas?

I live on dallas and I am already TABC certified as required by law in texas to be a bartender or server. I have made the decision to became a mobile/private bartender and freelance my services. This will basically be a sole proprietorship business for me. I have business cards on the way and I'm setting up my website as well. My only other question is: Aside from being TABC certified are there any other permits or licenses I need to get to do this in the state of texas?? I don't mean insurance (which I plan to get also). I don't want to get caught basically operating without the proper legal right to go do. All answers are appreciated, thanks!!