I think that one of your biggest problems will be technical support for the vehicle.
On a trip of that length, through all sorts of different environments, you will encounter problems with the vehicle. Doesn't matter what kind of vehicle you have. In your case, you have a very uncommon vehicle and in many countries you will not be able to find anyone capable of servicing it. Parts availability will be zero. Consider, for example, how you would be able to obtain a simple suspension part if it became damaged due to a road hazard.
I think you could probably get from Scandinavia to the eastern edge of Turkey without problems*, but beyond that, you would need to be prepared to either abandon the vehicle or pay huge costs to have it shipped home in the event of a major breakdown.
Michael
*subject to routing restrictions arising from the current conflict in Ukraine.
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