(these are set-ups while at home at a desk) Set-up Number 1: macbook attached to external monitor, keyboard, mouse, and time machine external hdd. (all of these things i have except for the hdd) Set-up Number 2: instead of buying a hard drive for a backup, buy a used mac mini for the home set-up, and then just sync the two computers with .mac. i suppose the mac mini would be more expensive than buying a hdd, but it seems like set-up number 2 is a valid option for a backup solution. and wouldn't require plugging and unplugging all the time. what do you think?