I had the pleasure recently of teaching a college class filled with bright eyed pastry chef students who all want to start their own businesses some day in cake design. This was quite heady but I felt a little alarmed by how little they knew about starting their own business. All were very young, many had passion for the craft, a few had some skill and none had any clue about the details of a cake decorating business.
After we piped, molded and rolled out countless design elements we sat down and did a round robin about business versus hobby. The bottomline is if you love creating gorgeous cakes then think seriously about making a career out of your talent. Learn from everyone, use every resource and do your homework about health, tax and business requirements in your area. The stronger the beginnings and more well informed you are about what you want to do and where you want your business to go the more success you will enjoy.