Without seeing your home I can't really answer, but I will add a few additional things you may need to consider. If you are putting Ethernet cables in the wall

Without seeing your home I can't really answer, but I will add a few additional things you may need to consider. If you are putting Ethernet cables in the wall, they need to be plenum rated cables. If the drywall is already up and there are no conduits for signal cables phone, tv then you probably can't make new runs without tearing up a lot of the drywall. This gets progressively more expensive as you run into studs and beams that get in the way. Avoid drilling through load bearing beams. If there are conduits for signal cables, look to see if the contractor was experienced enough to leave a pull rope or pull string in the conduit. If not, you can use a flexible "fish" tool which is a flexible cable on a spool that is rigid enough to be pushed through a conduit. Your hardware or electrical supply store should have these. If utilizing a pull rope, its a good idea to have people at both ends and 2-way radios or intercoms.