You're actually correct the size of the business goes a long way in determining the needed capital to start the business. I started my current business with about $4000, after paying for shop rent beautifying it to my taste and standard of my business, I didn't have much left for financing the business proper.It cost me two thousand dollars to start up a businesses, but the cost of starting a business all depends on the kind of business you want to start, whether it is a small or a large business, that will show the cost of the business start up.