Copywriter for horror film production company

I'm trying to raise funding for a horror film project. To help sell the idea I need some help with copy. I come from a filmmaking background and my prose and style needs to be improved.

There are two types of copy:

Promotional material - cast and crew biographies, stories about the production for web sites and press kits. These are all very short - a few paragraphs each at most.

Treatment - a three pages description of the plot

Please provide examples of similar work you have done and provide a price per hour. Also, please provide an estimate of how many hours you think the mentioned pieces of work would take. I am aware that such projects might take a few drafts to succeed. Please note: this is NOT a screenwriter role as I already have a working relationship with several.

Many thanks,

Paul