ISP's cap your upload speed to a fraction of your download so you don't run a server off your computer.
You can certainly spend more money to upload faster, but it's a waste of money and the data online can vanish or be held or spied upon.
Then there is a prolem that you want to restore your system and there is slow Internet.
Apple now requires fresh OS X installs to come from them online, it's better to have local drive to boot from anytime, so a bootable clone is ideal, better than TimeMachine which is only a backup system
I have set up an OS X server machine at home which I would like to use for centralized backup. The disks are all correctly formatted. All the other macs in the house currently have their own backupdbs.
In this context, the question "how about copying the backup to a server instead of a hard drive?" doesn't involve an ISP.
So, how about copying the backup to a server instead of a hard drive?