Your new house has a pre-existing security system
Many times after you purchase a new house, you’ll see that the previous owners used a security system. All the alarms and cameras work, are hung in the correct areas, and are ready to go. In this instance, all you might have to do is to call and start a new monitoring contract. A Vivint professional will still come to your home to ensure there are no integration issues, and they might offer options on upgrades. It's a preliminary trip, and you can get your 24/7 monitoring set up without having a bill for any new alarms and cameras -- unless you make additions.
The old homeowners can move an existing Vivint contract to you for a small transfer cost to make the process simpler. If the outgoing residents are moving to an apartment or retirement community, you keeping the Vivint service may be a part of the sale.
You want to move and bring your old components with you
You might need to bring along your favorite Vivint system with you to your new place when you move. It should be fairly simple to accomplish, as modern smart devices are portable. You can remove each device yourself or contact a professional expert to take care of everything. Then a pro will hang the same devices -- and any new things you need -- in the new home. Your home security contract will remain the same.