Dogs do tie you down. It's not just the fantasy quick trip to Paris you have to worry about, it is the family medical emergencies, your own medical emergencies, etc. Part of your decision has to be are you ready to call people on short notice that will be willing to take on your dog. That may be difficult in a new neighborhood.

Just like kids get you more involved in a community, so do dogs. That is both an advantage and a demand, only you can make that decision.