I have a second Harmony hub arriving tomorrow, and I know I can't have 2 hubs on the same echo account, so I plan on setting up a separate Echo dedicated to the second hub in our exercise room. Questions about the second account: 1) does the second accounts need to be linked using the Households program, or can it just be a stand-alone account? 2) I currently have my wife and daughter on the grandfathered prime share program. If I link my wife to my household, will my daughter still be grandfathered into the prime share program for the prime shipping, or does the households program cancel any shared accounts? My daughter is over 18, so a teen account in households is not an option.