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.
Recently a client asked me to do a sample edit and quote to copyedit his MS, which is a biography of his late grandfather’s career (and exploits) as a senior police officer early last century. When I did a short sample edit (4 pages), I realised there were some pretty major issues with his writing and the structure. So I sent it back with my comments and we discussed doing an MA, which I did. Now he’s working on sections of his MS and then sending them to me (he has poor health so we are doing it in stages). It’s a collaborative effort and we’re enjoying working on it together. If you have a client who is open to working with their editor, their book can become something they are really proud of, and it’s equally satisfying for the editor.
I am not without sympathy when some new authors get “sticker shock” upon hearing an estimate for my editorial services, and I am actually relatively affordable. (Most reasonably well-written novels would not cost even close to $3000 for me to edit, let alone $5000.) I also offer generous installment plans and discounts for bundled services. But there is a limit to how low I can go.
It’s always sensible to follow due diligence in submitting your first draft of your book to an editor by making as fool-proof a copy as possible for you because first, it is your own creation, and secondly, a horrid draft sent your editor can end up frustrating both you and him or her. Make your own corrections to the extent you can, so that will make the job of your editor that much lighter and the end result would be a lot more effective.