A house is very different than a typical commercial building, and in a fire, behaves differently. You don't need a plenum, to benefit from the safety offered by plenum rated cable in a home installation. The higher cost of plenum cable to deal with it is likewise, not a big deal in a home, where you aren't going to need miles of it as you might in a commercial installation.
Don't put the cheapest locksets available on your doors, either.