How long did the McDonald brothers operate their fast food restaurant before they started selling franchises to other restaurant owners?

Ray Kroc wanted to build a restaurant system that would be famous for providing food of consistently high quality and uniform methods of preparation. He wanted to serve burgers, fries and beverages that tasted just the same in Alaska as they did in Alabama.

To achieve this, he chose a unique path: persuading both franchisees and suppliers to buy into his vision, working not for McDonald's but for themselves, together with McDonald's. He promoted the slogan, "In business for yourself, but not by yourself." His philosophy was based on the simple principle of a 3-legged stool: one leg was McDonald's franchisees; the second, McDonald's suppliers; and the third, McDonald's employees. The stool was only as strong as the three legs that formed its foundation.

"If I had a brick for every time I've repeated the phrase Quality, Service, Cleanliness and Value, I think I'd probably be able to bridge the Atlantic Ocean with them." - Ray Kroc