if u read what the others posted here, basically u need to do a few things before u even start a shop

1) create your niche in the market. what makes you stand out over others? what will make fans drive a long distance just to go to your shop and not the ones nearby their house.
2) once u have created a niche, you need to make a name for yourself. where else to do this? youtube/facebook/etc basically show to the world why u r different. it is free also.
3) when you have enough followers/support or make yourself know enough, then you can think about a business. when you are famous, ppl will come.