Freelance editors normally do not double as literary agents. Not only is it not our area of expertise, but it can actually lead to ethical quandaries. There have, unfortunately, been cases of literary agents saying that potential clients’ work “has potential” but needs to be edited (by them or their employee), for an exorbidant fee. It would also be possible for editors to give the impression that they are guaranteeing publication of a project, when that is something no one but a publisher can do. Many professional organizations forbid their members to combine these two roles, to avoid a possible conflict of interest.
Your last point is actually raising my eyebrow in the sense that no one ever wants to make a newbies his/her editor.But the newbies can actually have some creative editing style which the experienced one still havent gotten..A case study is the people who work in the government house or secretariat, the same way in which they draft a letter in the 90’s is still the same way they are still giving it now.But giving newbies a chance to explore their creativity can bring about great and effectual changes..

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I do developmental editing mostly, so I charge a flat rate to read once and build an action plan, half before and half afterwards. Then we contract to work through the plan, where the bulk of the editing takes place and for this I charge 25% up front, 50% after the developmental edit, and 25% on completion of the final proof. I find that authors appreciate the spread payments and the transparency this brings.
Second, consider getting a critique before you decide whether you need to pay for a full copyedit. I (and probably many other editors) will read your manuscript and write a several-page critique for much less than the cost of a line-by-line edit, and if your mechanical skills are reasonably good, this may be sufficient to help you get it into adequate shape for your publication plans.
Well, hopefully, now self published authors can now see that there are a lot of AMAZING editors who can do outstanding work for a LOT cheaper than that list. As for the free editing sample, yeah – so long as the editor has solid proof that they are a legit editor with great credentials, that’s all you need. But if they don’t have that and won’t provide a free sample edit, then there are a lot of fish in the sea and it’s best to move on.
Additionally, I think that many GREAT, very reputable editors absolutely will not complete a sample edit for free. They can point you to their work, their testimonials, and their references, though, free of charge. And if you’re curious why editors I know do not offer a free sample edit, check out this video to illustrate the point.
I keep second guessing myself on things like where a space should go when someone is talking and if I have to keep saying “He said” “She said” etc., over and over. Or Mom vs mom. It goes on and on so I am thrilled to read Trish’s response about hiring an editor for a chapter or two. I would love to do that when I finish before I do a complete rewrite myself. I think that would help save so much time.