I worked through his FB account and no one should think he was alone!
It was more like expedition style with a couple of participants and organized by some tour expert company. BMW and Harleys among the group.
There were a total of six cars accompanying (Jeep and the like).
Broken axles, self repaired cars, Harley service in Switzerland for free etc. etc.
Don't even think you can organize the bureaucratic (visa, vehicle/driving permits) and logistic stuff like a piece of cake.
He described endless waiting at Chinese border, Kazakhstan easy in comparison.
The return trip was each to his own. Motorcycles shipped.
He himself flew back on Thai Airways from Frankfurt on Oct 25, on to Krabi next day.