As a self employed electrician/carpenter, this,' what is my time worth balanced against what will the market stand', never goes away. As a sole trader I don't charge vat, have no back office staff to support, no premises costs (vehicle based) no employees NI etc.etc. All this is reflected in my charges, yet still people baulk. Being rural I don't even advertise and work solely from recommendation, reputation is everything here. Even so, I have had repeat customers who have gone to Ikea, or the like, for a kitchen and had it fitted by them (often poorly) at about 3 times the price I would charge. I don't get it.
Also the expectation that you will source cheap parts is frustrating, because if and when they fail the expectation is that you will change them with no charge for your time.
People don't appreciate that, when they hire some, they get access to all their tools (a considerable investment) and all their experience (50 years in my case).
I recently paid someone £45/hr to sort my pc out remotely. I couldn't do it, had to be done.
Conversly recently replaced a tap washer for a regular and didn't charge - seemed mean to do so. Only to get a call back after a week saying that the pipe had started banging since I did it. Return visit implied