Hey,
with regards to your 2nd question: Many things have been said about travelling months in Europe but you also explicitly mentioned the Balkans and Turkey. While Turkey will be warm until late October most of the interesting riding is at higher altitude and will get fresh, cold, rainy or even snowy around late September. You get the idea when you look at Turkey on a topographical map. Keep that in mind if you want to visit those areas. The Balkans and Greece get cold in the mountains even a bit early.
Cheers,
Benjamin
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