Howl I agree with this. As an author, I promise that writing 1 chapter a day takes maybe 5 hours including editing (My chapters are generally between 1k and 1.8k words). A translator should be able to pump out 1 chapter a day easier than an author. Even if it is a lengthier chapter, it shouldn't take more than 1-2 hours for a decent translator to do so.
I say this because I have a friend who works as a translator and he can pump out a page in like 20 minutes. If you doubt his work, he is a really good translator in Japan who works for a bank. If they know both languages, then it is pretty easy. I said 1-2 hours for a story because they might want to find the correct word, but with the internet, it isn't hard.