Out of my home

I feel that being out of my home is holding me back.  If I had a shop where everyday customers could come in and buy last minute cupcakes or cakepops my business would take off through the roof!
Would doing this be a HUGE leap of faith? Of course!
Am I scared? You bet.
I have been told "you need to have a certain amount coming in before you can get a place." BUT What is that magic number? What do I need to be bringing in for this to work? I have NOTA clue. How do I get more business if I'm only going to Bridal Shows?  Yet again nota clue!
I know I want to be the Cake Boss or Georgetown Cupcakes of Iowa!  I need a business planner to help me get there!