Check out freelance websites like UpWorkor even a great site called Scribendi. (Warning: if you source an editor from these sites, make sure you hire another, professional editor to go over it afterward. There is no way to know what you are getting otherwise. Just because the draft comes back better than it was before, does not mean it was well-edited!)
Before we explore what you ought to be looking and asking for when you hire an editor, let’s talk about you, the author of the work, for a moment. On the one side are authors who, in response to an editorial query questioning the reason a particular scene was included, immediately suggest ditching the whole thing. On the other side are authors who will fight editors to retain even the slightest word changes. Before you embark on an editorial journey, ask yourself which side you fall on, and then own this truth and be willing to share it with the person you hire.
An edit is a business transaction. This means that money will exchange hands. Therefore, you need to approach the edit as both a writer and a businessperson (an increasingly common role in the age of self-publishing). Compare the deals you’re offered. Editors with brand-name backgrounds might offer less user-friendly terms (such as hourly rates, which are less predictable than fixed contracts), while less established professionals might offer discounts and extras (such as book formatting and publishing consulting). Don’t be afraid to ask. Hiring an editor is a professional investment. A sample edit will allow you to estimate the value of the service, but never forget about the price.
Once you have narrowed your options down to a few editors, five or less for example, set up some initial contact with each of the children’s book editors. Start by contacting them and see if they can answer your core questions via email. Find out if they are willing to chat with you by phone or skype about your project when you are ready to make a decision. Ask for them to specifically identify what children’s book editorial services they will be able to provide.
Start with a google search and see what comes up. Click on a handful of options and see if you can find an editor who is specialized or who has edited books similar to your own. An easy way to do this is to open just a few of your favorites in tabs and check out each editors’ website and about me section. Take a look at their testimonials. See if any stand out to you.
Note: On the spreadsheet, the editor’s total cost will be automatically calculated once you insert your total word count and the editor’s per-word rate. If you’re given a per-page rate, you can calculate a per-word rate by assuming the industry standard of 250 words per page, e.g., $3 per page equals $3 per 250 words. Dividing 3 by 250 equals $.012.
Due to popular demand, we’re adding a low-cost manuscript review + passive developmental edit to help you find and fix the “cause of death” before you invest in editing or proofreading. You’ll get expert eyes on your manuscript, and while we won’t focus on or fix every little issue, we’ll help you identify the big red flags that are killing your book slowly. These are the places readers will give up and agents will ditch your manuscript into the slush pile. In-depth comments and suggestions will be provided to help you clarify and restructure your book, but this feedback is “hands-off”: we won’t go in and actually make changes, though we will point out signs of weak writing, repetition, and provide tips on how to improve as a writer. If you think your manuscript might be a mess, or you want to focus on the large, important stuff that matters most, this is for you.
The result will be a very clean and much improved manuscript, but with lots of comments and suggestions, which will probably require some rewriting and extra work on your part. Getting back a heavily edited manuscript like this can be challenging, but know that it will drastically improve your writing skills and help you identify your weaknesses. During the revision process, it’s possible to create new consistency issues, which is why we recommend a final proofread or at least some beta-readers to help finalize your manuscript.
I have heard so many horror stories about editors and experienced a few myself. If an author is uncertain about an editor, most editors will do one sample chapter or 10 pages (whichever comes first) for free to give the author an idea of their style. Edits can be very intense and I would encourage authors to listen if they keep hearing the same things about their work from different sources. That said, they also don’t need an editor who is so brutal they never want to pick up a pen again.
Regarding your last question, I know of no editor who gives a money-back guarantee for occasional errors that happen to slip through or for a different opinion by a later editor. I’m afraid such things are just the nature of the publishing beast. But by having a shorter portion edited first, you will get a decent feel for whether someone is the right editor for you, and will be able to be confident in his or her work on your entire book.