HAVE SOMEONE TAKE THEIR 'OCCAM'S RAZOR' TO THE INTRODUCTION TO MY EBOOK

I have written 3 different Introductions to my book and shown them to different people. Everyone has an opinion and some prefer one, some others! My head is spinning and I need someone impartial who is good at English and also good at 'zero-ing in' on what most people want. The book is non-fiction, non-technical and shows people how to get rid of the negativity in their lives, have more clarity and increase their 'bounce-back' ability using an unusual but highly effective technique. There are currently about 3- 4,000 words. I would like someone to read what I have written, take the facts they think would appeal to most people REARRANGE THEM INTO ONE -SHORTER-INTRODUCTION IN A WAY THAT FLOWS, and ditch whatever they feel is FLUFF or UNNECESSARY [ almost everyone has said the content is well written, SO HOPE THAT HELPS;)]. The Introduction will also be used as part of the website to promote the book itself and my goal is that once people get to the end of reading the Introduction they are sold on the idea that the technique will help them and keen to press the BUY NOW button.
IS THIS SOMETHING YOU FEEL IS 'UP YOUR STREET'? Please give me an idea of HOW MUCH YOU WILL CHARGE AND HOW LONG IT WILL TAKE . Thanking you in advance :) Marjorie Green