Old Hack, it is costly. But if you'll allow me to play devil's advocate: time is priceless. Many people go through multiple drafts (we're on draft gazillion as far as I can tell) and spend endless amounts of time revising but not learning. People learn differently from one another. For some workshops, peer reviews, propositioning people on forums like this one, classes (online or in person) work. But those things are ALSO costly. Some in terms of money, others in terms of money, many in terms of both.
So saying editing is costly is disingenuous. It's all costly. As for costs being recouped. If you think of it as just a service that you are paying for, you may have a point. But working with a good editor is a fantastic learning experience. And education is expensive. I have the student loans to prove it.
Working with a good editor that you click with and trust, you get the one on one attention of someone in the trade (that you don't have to beg, barter or trade for), with experience and a new perspective, on your actual writing. On the full scope of your manuscript. And that is invaluable as a learning experience. I could have taken writing workshops. We have them in my area. But the good ones are very costly, and I would not have had someone looking at my entire manuscript. And I would still not have someone looking at the entire body of my writing and noticing trends (both good and bad) and telling me: look you are doing THIS really well on page 10 and on page 300 but on page 50 where you do it, you fail.
So for me, it's not about things being 'costly' or 'recouping.' It's about value. And the experience as a whole was invaluable. So the cost is already recouped in my perspective.
On top of that, in our particular case: we are husband and a wife team writing together for the first time. Working with an editor helped us have a third perspective when we disagreed about things. And our editor did not change our voice. She helped us better merge our voices into one. Again, invaluable. And again, those workshops (for 700-1000 per person) for the two of us would have been expensive as well.
And, once again. This is not a thread about the value or costs of professional editing. It's merely asking if you can give me a recommendation for a specific person who can do what I need done.
And finally, I do not believe in one size fits all advice. You do not know the circumstances, viewpoint, or perspective of the people you are talking to. So allowing that some people may legitimately and successfully do things differently is both empathetic and polite.