This, times 100. My current side business (which is hopefully going into a full time business soon) has these three roles - biz dev, ui/ux, and web dev. It allows people to focus on what they do best, but still have some cross over. Luckily each of us has experience in each other areas as well. I could be wrong, but I feel like this setup of those 3 areas is ideal for launching a web based business.