Here is a nice story that shows how easy it is to establish an operating fruit and vegetable drying business.
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Menar Meebed of Egypt, has used a commercially available solar dryer and a simple Internet blog to set up a business selling dried fruit and vegetables. Her product is of a higher quality than the traditional products because of the fruit she selects and the fact that the solar dryer reduces the drying time.
The commercial success of the business of course depends on how well she sources her produce, whether the market demand for her product is big enough and how she manages the business but the basis is in place.