Oh, about the price doubling, that's a bit disappointing for sure. It seems he simply adjusted his pricing according to the market. But for Chinese standards it's too much in my opinion.

It may help to realize he's just a Chinese dude that found his niche and trying to make a living, and as far as I can see he doesn't have too many visitors.

By which I mean, I think you can negotiate hard. If you simply say "I'm sorry, but I'm traveling and I can only afford $... total", I'm sure you could bring it down pretty significantly Like, close to what I paid.

I could be wrong obviously, but in my eyes there is simply no way he is making that kind of hourly rate in the other stuff he does. Get that price down!