To a certain extent, I must disagree with "college ain't gonna help much, you gotta know guns."
As others above have stated, running your own independent business is very tricky stuff. You can be the greatest chef in the world and that doesn't mean you'll become a millionaire in the restaurant business. You need to know about insurance, sales & marketing, accounting, finance, contract law, business & strategic planning, zoning ordinances, licensing requirements, OSHA & EPA restrictions, tax planning, inventory control, statistical analysis, labor & employment laws, floor display design, and physical security. Just to name a few things off the top of my head. Granted schooling is no substitute for real world experience, but in this case it is a good start.
That being said, people like to deal with somebody who knows what they are doing, and if you don't know your own business (in this case guns) customers will be able to tell.