"those with professional installation experience"
So I am guessing that you want to hire it out. Can't help much there. Sorry. It is a very easy job when you can get full access to the area that needs the wiring run, it can be a whole other story if the area is finished, as I am suspecting is the case. I've "fished" wire all sorts of times, and many times it is easier to buy more wire than you think and run the wire in a "less than direct" path. That makes the job potentially easier, until you start running into length limitations.
Someone would need to be onsite to really get a feel for it since every job is different.
