From a client perspective, I think you should charge for making a detailed quote. To give you an example. A pipe burst in my bathroom. The plumber indicated that there is a call out fee of R750 after which he will then create a quote. He gave me a detailed quote which I used to source quotations from other plumbers.

I think that this an untapped market out there. Pre and post installation - Pre - detailed quote; Post - Review to see if the electrician work was up to standard. I am willing to pay R750 + R750 for such a service.