Hi there!
I consider that I am a very good candidate for this task, actually I have some free time and it seems to me a very good opportunity to maintain my level of English.
Refer to your inquiries, I think I charge by hour, and I think can process 4/6 hours a day, being conservative. My level in american english actually is advance, and I don´t use a machine to translate, I heard the sentence and translate it, sentence by sentence.
If you are interested, please feel free to contact me by chat.
Regards
Martin