3:2:1 - Cattle not pets - If your data is backed up in multiple sites, the death of one site shouldn’t overwhelm you, and give you time to recover.
If your primary site drives are getting above their designed lifetime, rotate them out, sure - but they could be used as part of the backup architecture else where (like a live offsite sync location with enough tolerance for 2 disk failures to account for the age).
3 copies of your data; 2 types of media; 1 copy offsite.
I don’t have a solution for you, but I hacked together a kinesis keyboard and a trackpad using industrial velcro (since the kinesis 2 has a usb hub built in) it worked great.