We've got off on the wrong foot somewhere Mr Lard, (I'm not comfortable with captain), I don't know why really, 'misunderstanding is the incubator of strife'.
Anyway, I've just been reading this thread with interest, you are a canny lad!
For what it's worth, if I was you I'd set my price and stick to it. Some will go with you, some won't. You live in a tough area. A friend of mine moved to Glasgow from down south and started w/c about 5 or 6 years ago, he set his hourly rate and stuck with it. Some kicked him off the door, others went with him, he's moved back down south now, but he did fine.
There is still a north/south divide. I live east! Inbetween