There's a hard way to make money and there's an easy way... Making a Razzle is definitely the easy way! Almost all the major restaurant chains that serve soft ice cream have some version of the Razzle blender. It is typically branded and heavily marketed due to the high consumer demand. It's also extremely profitable, typical margins are around 75-80%.
With only 15 servings a day, this low cost investment can be easily recovered within a month!