How much do you pay for customer support services?

Hi all,

Great to be able to post on these boards; I wonder if I might ask a question of you all? I am currently in negotiation with the lead developer of a popular mobile application (featured in editor's picks, top of charts etc.) to provide customer support services. Specifically, these services will include writing FAQs, technical operationa manuals, privacy policies and content for the website/blog posts, as well as compiling bug reports and providing general customer support. I am wondering how much to charge for my services per hour, and I am curious if anyone on this board has ever hired someone to fulfil the above (or similar) tasks. If so, how much would you expect to pay an employee or freelancer (per hour) for these services? I just want to get a feel for the general amount of money expected to cover these services so I can make an informed pitch. I'd be really grateful for any answers to the above question, or any other tips or pieces of advice you might have. Thank you!