Hello there,
Hope you get the job, Namibia is beautiful, flying is safe and the 210 is fun.
may I suggest to get your medical elsewhere? maybe some other AMC will agree to the annual checks? Depending on where you do it in Europe, the JAA class 1 renewal is 50 to 60 Euros. Check to where the flights are the cheapest and where you can get the medical. There are JAA examiners all over the world, I would have thought somewhere in Africa too??
good luck! IP