At the moment, it looks like she just plans on turning off all connectivity on the iPad so that it will no longer sync and the app will remain even if it is removed from the iTunes store.
Huh? Removing an app from the store doesn't remove it from devices that have it installed. There's no reason to disable connectivity. If you sync the device with iTunes (instead of just backing up to iCloud) then you can keep the app forever.
Huh? Removing an app from the store doesn't remove it from devices that have it installed. There's no reason to disable connectivity. If you sync the device with iTunes (instead of just backing up to iCloud) then you can keep the app forever.