Christmas Suprises Lead to A few Questions abt Mulitple Machines

I went to the post office today, as we are waiting on some Zip Loc bags from Amazon, the clerk says come back here, you have a box.Pretty strange, but whatever. Turns out my loving wife has purchased a X1cCombo.We had discussed it before, and I thought we were going to wait a bit, but she, apparently, had other plans.
So heres my questions
Should she register the new machine, create new user,etc, or should I?How does that work with the filament sub? I have an X1c already,can I just register the new machine and qualify for the sub?
Then I am assuming I just set up the machine on my network like the first one, and select machines from the slicer to send prints out. Please clarify anything I have wrong,
I’m sure someone can point me straight

No quick answers here, so I just went ahead and added the new printer to my account.
The filament sub seems non transferable, and theres usually no filament in stock, so screw it. But my small print farm has begun.