I need a grammar checking of my documents

I have to send a letter to potential clients and colleague in my area to gain more job.
I have prepared a simple letter to be sent to some of them (one page only, 150 words).

I need someone that can help me to check my grammar spelling and the structure of my phrases.
This will be the beginning of a future collaboration as I am planning to use Peopleperhour more often to check my documents and send email to my clients so please provide me your best price.

Thank you.

A.