Stephen, I’m not sure what you mean by “time wasted matching a style guide.” Any professional editor of trade books knows the Chicago Manual of Style well and as a matter of course automatically makes changes that are in line with it. What you said is akin to “They waste time correcting spelling errors.” They’re not wasting any time; they’re doing their job and it’s a basic and automatic part of that job.
What an editor does is discover your characters, your situations, and your images without seeing any of the creative process that brought them to life. Where you might see all the crossings-out and labors, all the accidents and decisions, the editor sees only a page. This is the clarity you need, and you can never achieve it for your own writing, simply because you envisioned it first. The editor will tell you what an attentive, an educated, and, most importantly, a new reader will experience while reading your book.
So because of this and because I don’t live in NYC or LA, I decided I may have better luck writing a book, which I have been doing for several months now and enjoy; however, I know it needs work and I can’t go back to the 5th grade and pay better attention to the simple “put your period here and comma there” lessons so I was hoping to learn as I go with reading, writing and seeing my finished product after hiring an editor.