Scott,
Yes, a good business can be made in selling berries. However, the work involved during berry season is very labor intensive. Especially the havesting. Prior to diving into the venture, I suggest that you research the berry types, harvest times, and market conditions prior to planting.
If you are close to a populated area, setting up a "pick your own" operation may be good. Or a hybrid of pick your own and offering picked berries at a premium price. I know that my wife went to a hybrid operation and picked the fruit herself for two years. She then found out that the extra money paid out was cost effective (she buys the fruit to make jams and jellies to sell at a garden market). She also buys the fruit to sell fresh at the market. We are in the process of planning to increase the size of berry crops. We will still buy from our supplier as we need a lot of berries for our jams and jellies.
Terry