I suggest to make transfer of hardware little less a nightmare . You can do it via opening ticket in support like if it was a bug. Which means that in case of hardware failure you are in trouble.
Import didn't work I had to copy the old building directory into new server (think of also saving that preciously because if you think you are protected with back up you are not, when I see how painful it was to transfer the license I cannot imagine how easy it would be to get hep on that topic )
After you have to update all application phone table and other medium of the family, with a system that does not allow you to check password entered (which is so nice when you used secure randomly generated password and not "smarthome"). Redo the alexa setting and I dot not know what else if you have connected more.
Customer support service by UserEcho