Power isn't so bad really. These were all 2tb disks, so ended up with about 40tb total after shenanigans.

Cabling was atrocious. I'd originally been using several pulled 4 disk SAS backplanes from servers thrown out of my work, just screwed down to some pine boards in a stack.

Zip ties and sata/sas cables were the rule.

Overall the drives had 4 small power supplies initially, 300watt iirc. Cheap.

Somewhere I have an old photo from the wiring during the "rescue" but I have to look around.

Disk failure was actually not an issue for ages before. A specific thunderstorm with 2 nearby tornadoes is what caught me this time. Before that, the occasional single disk every 6 months or so.

I still have running arrays using 15 year old disks, many with more than 10 years of that powered on. If you find good models, they can last ages.