Marvin, thank you for responding.
I finally managed to do it, but the hard way.
I created a TM backup of the Mini, created myself as a user on the MacBook, installed and updated all the software, and migrated using the TM backup, which then created my wife's user account with all her data.
So, now the MacBook is up and running, currently undergoing a SuperDuper! cloning.
Thanks again and cheers