You might want to talk to you SCBWI regional advisor about options in your area. Most regions have some critique groups. And we do have a critique group matching area and a place to post a chapter on these boards.
As Lisa said, you're better off going as far as you can for free. You learn more that way and spend less. If you get a paid critique early, you'll have to get another based on your revision.
If you've already done critiques and are looking for an edit with an eye to self-publishing, you'll still likely be better off with a service in England because the British and US markets differ (though good writing is good writing.) That brings me back to your RA. Good luck.