Before becoming an agent, I worked as a freelance editor and writer. I rarely do any freelance edits anymore, though I might be tempted to do an edit on occasion.
Note: Before paying for a professional freelance edit, I recommend reading and doing the exercises in Self-Editing for Fiction Writers by Renni Browne and Dave King. I can guarantee that a majority of the issues in your manuscript will be resolved by simply doing that. And it’s a whole lot cheaper.
If you’d like to query me with a manuscript (picture book through young adult), you can find that information here.