IMO the best (but not the cheapest) option would be to use personal NAS server with some level of mirrored RAID. Configure backup from all machines/data you wish to backup to the NAS server. Then sync it with cloud provider. Of course when picking cloud provider do check to have strong data encryption, 2F authentication, account/data access audit and DO backup your encryption case (in case you loose it there would be no way to acces your data) - just print it in plain text form and store somewhere safe.
If you do it right everything would be automated and you won't need to do any manual actions with it. Just monitor its status. And do test recoveries from time to time.
And YES - I've noticed you are against the cloud which is in my opinion silly. Decent cloud provider's DC will by much more secure (as in physical security, data mirroring) than any homegrown solution. What you are afraid of? If you are afraid of automated attacks like malware they will target your personal machine anyway, not your backup, backup is not the weakest link here. Also any profiled attacks on your person will target your client machine. So what is your practical point against using cloud storage?
Also worth mentioning that NAS server is not mandatory in such setups. Just it speeds up things a little and gives more control. Also it provides the "oops" factor protection (like incidentaly deleting something - which is satistically the most often case to need backup recovery anyway).
Still if you oppose to use cloud just exchange cloud option for offline media stored offsite (like safe at your friends house or bank). Which media to use is entirely up to you. As you haven't stated what your need are (like how much data, how often it changes, what would be your preffered policy as weekly, monthly etc.) I can't recommend anything. An uneducated guess would be to use external HDD drives in enclosures and rotate them. Or for the cheapest option BlueRay discs.