Gear failure is the bane of my life. Well, that and predictive text, but that's another story. I'm positive all my home devices conspire together, then synchronise their own deaths so I have to replace everything at once. Makes for some disgustingly painful troubleshooting when more than one device stops working at the same time too.
Finally got my humble home NAS back up and running properly the other week, but three months, two drives and a power cable later I'm still grinding my teeth a bit.
Sounds like you've got everything under control though. Looks like a pretty long list of things you've learnt today too. Kudos!