So you ask yourself, 'does this person exist?' Yes, as a matter of fact they do. You're looking for a book coach. You need someone that is positive and similar in mind to you. You also need someone that is a good editor and can offer positive feedback. There are many book coaches, but finding the right one for you is really important. Set up a conference call and interview the coach. Find out who they have coached. Get a reference from them. Ask them to edit a couple pages to see what their style is like. You're going to be spending a lot of time with this person and you really need to trust their judgement.
Most coaches charge between $30 - $60/hour. Usually you get what you pay for so don't go too cheap. If they haven't been in the publishing industry very long they may not understand the in's and out's. Word of mouth is usually the best, but if you don't know anyone then you can look online.
SERA Publishing offers coaching for $45/hour and has been in the business for 14 years. Other options include Becky Levine. You can find her on facebook or her website www.beckylevine.com.
Enjoy your hunt and get into the groove, start writing!