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 hope this helps! Please don’t be discouraged by editor’s rates. Many of them do this full time or to supplement their other income with their business. The quality of service is not necessarily tied to project cost, but hiring anyone who is a contractor or freelancer often means you’re getting one-on-one personalized attention you might not get if you worked with, say, just the editor of a publisher who could see your book as a quota to fill. Just my two cents!
In return for the sacrifices you must make in order to self-publish, you will gain total control over the project. In addition, any profits from sales of the book will be yours (not just a royalty percentage as with either a traditional publisher or a vanity press), and in some cases it may be the only way of getting your book into the hands of readers. However, there is no getting around the requirement to get the tasks done one way or another.
I implemented this way of working years ago and see how empowering it is for authors, and helpful for editors to boot. This doesn’t mean you’re asking your editor to do a free sample edit. (I discourage editors from doing this and caution authors who push for it as asking editors to work for free before you hire them may result in resentment.) Paying an editor for a few hours of their time to ascertain whether they’re a good fit for you is a great way to put your toe in the pond before submerging yourself. You can then see for yourself if the editor’s suggestions and comments resonate before moving forward with the whole project.
Val, thank you, lots of good stuff here, and it’s great to suggest giving a credible newbie a try. As an encrusted oldie, I can say that it’s sensible to deal with a niche/specialist editor, but sometimes editors have broad experience in both fiction and nonfiction writing (I’ve written and edited a good deal of both), and thus can edit with confidence across styles and genres. Thanks for a sound, thoughtful post.
There may be provision to have a call to discuss the work, or it may purely be the delivery of a structural report or a line edit or proofread manuscript. I've worked with professional editors for the last ten years and have never had a call to discuss, but if you're the type of person who wants that, then make sure you put that into the contract upfront along with anything else you are concerned about.
I cannot speak for all editors, of course, but I know I and many of us would be open to editing just part of your book at first, say, a particular chapter or two that you sense needs a lot of work. That is often enough to show you mechanical errors that you tend to make repeatedly. You can then go through the entire manuscript yourself looking for as many of the same kind of errors as possible. You will sharpen your basic writing skills in the process, and it will pay off in all future projects.