I have heard that the relationship between writer and editor is akin to marriage, the two contributing energy and support to the developing story. The Rules trilogy will benefit from an editor perhaps more than my previous works since it is an epic fantasy with a vast world and complex concepts that need to be communicated effectively to readers. It's always important to have others review your work since, as the author, you read in assumptions and errors that make it more challenging for readers to engage.
I am fortunate that I can afford a professional editor's services yet the expense has definitely been the biggest hurtle to overcome. The editor I have chosen is reasonably priced compared to others and possesses many years of experience, including an epic fantasy trilogy. I am optimistic that it will be a positive collaboration and will document anything of note here.
I have considered pursuing editing as a career so also view this interaction as a way to watch an editor at work and determine how I might perform in the role. Since I love language and writing yet still need to make a living, editing might be a career that satisfies both.