This is not really a trip report, just some comprehensive notes ...
1. I did ride from Khon Kaen to Dan Sai and stayed overnight there
Yep, that info is correct. The website has everything on it.
And yeah, it isn't cheap. The price is the standard price for WFRs in the US.
There happens a lot in the meantime. I did have a nice time in Buenos Aires, a very nice city! I like the city from the beginning.