Site:
FWIW, why don't you provide a 'base' price? Spell out (in a proposal) what you will provide (NEC minimum) & a $$$$. Along with that throw in some $$ for 'additional' items; ie: recessed @ $$, receptacles @, branch circuits @; etc.
A recent 8200 SF McMansion was 23.5 bare bones, and over 55k with all the toys.
Remember, you are the guy investing your time. You have any history with the builder? When I ran my business, I had a steady client base, with great relationships, and trust by all parties. We (the world) are going thru some tough economic times, and each of us has to do what we have to in order to make a living.
