When I installed satellite a wall fish for one line could take 20 minutes or 90 minutes depending on the house and the layout. Houses that have been remodeled including restructuring and adding on additions are nightmares when its work thats been done by shady contractors or well intentioned but uneducated homeowners ( I recommend watching Holmes on Homes on Discovery Home channel before you higher anyone to do any kind of remodel on your home ). Wall fishing entails measuring, locating utilities, locating studs, drilling, cutting drywall, using fish tape or glow rods, working in attics / crawlspaces / basements and all of this adds time and scenario's and its a part of an install that should not be free.