Hello Kninjanin,
I don't know much about franchises, as I have not done it myself. I looked at your responses from Hitman and Rooster, and don't really know of anything else to add.
So just to emphasize what Rooster and Hitman have mentioned, with a franchise your business will have the support of an established chain of businesses like yours, and help through advertising and name recognition.
However, it can be costly to buy into a franchise, and you lose much of your freedom to make your own decisions.