Hi there mr electrician,
I don't really think that pricing is any great secret these days.
But if you have a gander through the Business section here at ECN, I'd just about put money on you picking up a tip or two.
I'm also an industrial electrician, who specialises in factory re-wires and plant installs.
I also do Domestic and Commercial work, Data/Phone wiring and TV/Audio cabling.
I have just quoted a job for a new house with all the bells and whistles and I happened to pick the job up, which is good, because the 3rd year apprentice I have has never done any domestic wiring work.
Believe me, it isn't magic or anything silly like that to quoting out a full house wire, what I will usually do in the first instance, is get in contact with the people that will be living in the house, go over the plans and find out exactly where they want things put, believe me, there will be changes through the construction process, that is one thing that will be constant.
However, once you have a good idea of what needs to be installed, you can then work out things like the amount of cables you'll need, a bill of materials for all your switches,recepts, etc.
I always over-quote on the amount of cable for a job, it will get used, believe me.
I hope that this post is of some use to you.