Traditionally, the most important methods used are concentration (to a paste or puree and drying either fruit pieces or to a powder.
The question of funding is always a difficult one. As you may be aware Practical Action is not a grant making organsiation and does not provide funding for other people’s projects. In fact, Practical Action relies on funding support from other for its own projects.
There are many different sources of funds and the one that you would require depends on the type of enterprise you are involved in. For commercial enterprises the funding may come from banks and credit organsiations but for charities the funding can come from grant making bodies that have a specific area of interest.
There is also a growing interest in crowd-funding initiatives such as Kivo http://www.kivo.com/ that allow individuals to invest directly in new directly into new ventures from across the world.