need a native English speaker to correct my content

Job ID: 32125805

Budget: $30 – $250 USD

hi, we have some script which is created by some un-USA people , We hope you can optimize the grammar, phrase, sentence structure, and oral expression in the script.
please note: this script is for course, it must be Very colloquial.
you can check on of our lecture in the attached.
we have large quantity or words, more than 150K words, please offer a very good price .
we only need US-English native speakers, if you are translator, please do not big on it .