So, guy spent around 10 x $100 (2TB drives), maybe more since you mentioned redundancy, for a total of ~$1000. Guy kept drives probably up 24-7, spending a lot in the electricity bill, I would say something in the lines of $150/month. Guy also had to manually maintain the complex disk array, prone to failure. Guy failed at it and lost invaluable amounts of (mostly) unrecoverable data (good luck getting that TV show from the 90's that now has 0 seeds on TPB, your familly event pics and videos, or your college papers).
Now tell me, how can ~$250/month be expensive for 20TB in Amazon Glacier? They will give you transparent redundancy (if they lose the data you have reasons to sue for MILLIONS, you know, those numbers with 7 figures instead of 3). They will pay the electricity bill. They will buy the hardware. They will maintain the hardware too, so no need to replace drives. Your ISP is shapping traffic to AG? Sue them or change provider. Last time I checked it was a lot easier than doing ANYTHING on your 4TB+ RAID array, especially since it's for home use and will return you absolutely nothing besides self-complacency.