You’re relocating to a house with home security alarms
A new home may come with an existing home security system. All the devices function well, are hung in the right areas, and are ready to go. In this example, just pick up the phone to call and set up a new monitoring contract. A Vivint professional will still come out to make sure there are no usability issues, and they could offer suggestions on upgrades. It's a fast trip, and you can get your 24/7 monitoring set up without worrying about any new components -- unless you add on.
The outgoing owners can transfer an existing Vivint contract to your family for a nominal transfer fee to make the transfer a snap. If the outgoing residents are downsizing to a condo or retirement community, transferring the security service may be an addendum of the sale.
You are looking to move and take your existing equipment with you
You may want to bring your old smart devices with you to a new house when you move. It should be fairly easy to accomplish, as many alarms and smart devices are wireless. You can uninstall each device by yourself or call a professional installer to dismantle everything. Then a pro will hang the same components -- and any smart items you need to add -- in your new place. The home security contract will keep the same.