Get this book http://www.amazon.com/E-Myth-Small-Businesses-About/dp/B000DZTP5S/sr=1-7/qid=1172494759/ref=sr_1_7/002-2148804-3880036?ie=UTF8&s=books
The author has since spun that one good idea into a veritable empire of advice & I’m-such-a-guru worship. The rest of what he wrote/sells is derivitive bunk & should be ignored, but the original book was damn solid.
Understand that running a business is mostly about business & only tangentially about your particular product / service. In general, if you like providing the service or are super knowledgable about the product space, that’s exactly NOT the reason to go into business trying to sell that service / product.
Having done startups a time or two myself, I agree with the experience of others above. It takes about 3x the money and about 10x the effort you think it does.
I also strongly agree that you ought to have job experience in as similar an environment as you can find. For your particular idea there are no direct ananlogs in your local area. But you can certainly find something similar, whether that’s working at a gamestop, or a camera store, or … Anything where you have to live the problems of running a retail establishment that provides both product & service.
I also agree with DrDeth. Between customers & your own need to make it succeed, the worst boss you will ever have will be your business. “I demand you work 23 days straight days for no pay.” “I demand that whenever anyone else calls in sick, you have to cover for them, regardless of whether you just finished a 10 hour shift.” Oh, and you can’t quit.
That’s something to think about, if you’ve (consciously or unconsciously) fallen for the TV commercial: “Start your own business, make $100K the first year & lay by your big pool while your minions slave at the shop…”
There certainly are a few folks who invent successful get-a -strong-income-quick ideas that do work; many suddenly popular website ideas fall into this category. And some of them need surprisingly little effort to keep alive once they get going. But what you’re planning is emphatically not that. It’s retail.
Good luck. Keep asking & studying. You’re probably a couple years away from being ready to start something like you want. But the harder & faster you work the project now, the sooner you suceed.