Yes, the Sonos Play 1 speakers can easily be tuned to different services within the same home. Your daughter can move them around with no interference to their operation; they need only a wall outlet. Yes, they will synch easily to your current Sonos system. Yes, they transition well outdoors. While they certainly aren’t waterproof, they are humidity resistant and work fine outdoors as long as they remain within range wi-fi range. I would suggest they not be used in close proximity to a pool or jacuzzi since they use a 110v connection to an outlet. Otherwise, they’re the perfect outdoor solution.