To send away, I've heard from £100 pw to top price £300 pw!
I do breaking and schooling freelance (I come said persons yard) I charge £15 pound per session (up to an hour), Or we agree a fixed fee for a number of weeks.
Thus depending on temprement of horse, if the horse is a nutter, you get charged more!
Our chap comes to us, charges £20 a visit, visit lasts as long as it takes (about an hour usually), he brings any equipment we don't have, and tells me what he's doing and why. I also get shown how to do stuff and practice under supervision. So £100 a week and the horse doesn't have a major break in routine, and gets long reined round our roads and bridlepaths. Oh, and I get to see what's going on.