I wish you guys good luck. If you feel like it,just do it!
I had a similar idea in 2010. I worked here and there,got support from friends, never spent on luxury. It worked in Europe but not in Africa. You will quickly realize how lucky Greece is compared to Mauritania,etc. Save some money while you are still in the Eu for the rougher parts. There are no trashcans full of food over there. Oh,and if I were you I would hide a few hundred euros for medical emergency.
All the best,