American English Proofreading Needed

I have several business-oriented marketing scripts that will be turned into training and explainer voice-overs. Before they go in front of the microphone I want every line polished so the flow sounds natural to a U.S... (Budget: $10 - $30 USD, Jobs: Audio Services, Business Writing, Content Writing, Copywriting, Editing, Proofreading, Script Writing, Voice Talent)