I have a fan+light in the hallway at the top of my stairs, with pull chains on the unit and a 3 way switch at the top and bottom of the stairs. I'm replacing the unit and would love to have it wired up so that the light remains on the 3 way switch setup and the fan gets wired up to a second wall switch at the top of the stairs (multi speed fan control). My understanding is that many fans on the market can be set up like this (without the pull chains), but this would likely involve running extra wire from the unit to the upstairs switch. Is this a big deal? My general contractor is trying to convince me not to bother.