If you do wish to take on this project and investment, I would highly recommend building a relationship with an importer/exporter. They can support you and help build the program, provide feedback, etc. I don't personally know of any in relation to Madagascar, but I would reach out to Coffee Quest, Royal, Caravela, Red Fox, Long Miles, or CCS. They all work in specific regions and might be able to steer you in the right direction.
As for the production process, it is very labor intensive. You'll most likely want to grow other plants for the sake of building an ecosystem and help diversify your farm crops. The other fruit trees can help provide shade to your coffee trees as well as offer other benefits.
It'd also be good to know what the variety and cultivar of plant you have and have a soil test done in multiple areas of your farm. It'd be most profitable to grow specialty coffee and the price is set based on quality. The higher the cup score, the higher the price (in most cases).
As for the production process, it is very labor intensive. You'll most likely want to grow other plants for the sake of building an ecosystem and help diversify your farm crops. The other fruit trees can help provide shade to your coffee trees as well as offer other benefits.
It'd also be good to know what the variety and cultivar of plant you have and have a soil test done in multiple areas of your farm. It'd be most profitable to grow specialty coffee and the price is set based on quality. The higher the cup score, the higher the price (in most cases).
Good luck!