That sunshade on the control tower suggested somewhere equatorial, but the white bakkie definitely places it in the Southern African continent!.
With you noting it not being RSA (where the last big airport cash splash was for the 2010 World Cup), I can't imagine there has been much airport development in Zambia, Zim, Moz or Swazi in last 5 years, so perhaps Namibia or Botswana?