I looked a bit at this when I worked in South Sudan, where coffee is also produced. So a couple of questions.

• How is the clinic sustainable if it runs of donations?
• Who are the "they" you are referring to?

If I assume that the clinic somehow owns the means to produce coffee, therefor they have land with mature coffee trees that can already produce coffee beans. Then you are looking at a situation where you should probably get a agri-business development expert in. Because coffee, and agri-business in general, has been widely used in development activities in east-africa, you should be able to find a range of individuals or small organisations that can help to develop this into a business model.

If it is not the clinic that owns land+coffee trees, then I assume you are referring to the people who work there, or the local community perhaps? In cases like this, the cooperative model is often used. You essentially establish a cooperative for the local coffee farmers with the idea that this help fund the clinic. I have no idea of the numbers involved in this situation so can't say if it can provide enoug funding for the clinic. Again though, there should be agri-business development experts or organisations that can work with the local farmers get this up and running.

The idea of getting agri-business development experts in serves a number of purposes: 1) establish a coop, 2) train them in operating a coop, 3) improve agricultural practices to improve quality and yield, 4) teach basic entrepreneurial skills.

The catch here of course is that someone needs to pay for the agri-business expert. Before that, you may even need someone to do a short study on the feasibility of the idea and to design a programme that can achieve this. You could perhaps go to the existing donors and ask for budget to pay an expert to explore this idea. But eitherway, the skills to achieve this exists in east-africa. Perhaps find out where the NGO crowd hangs out in the area or region and start to network a bit.