You’re correct but you apparently don’t know how exhausting it can be to listen to kids talking from the second they wake up until the very moment they fall asleep.
I am very bad at filtering input (especially sound and touch) and sadly the Christmas days, when daycare was closed, were complete torture for me.
Earlier this year I built something similar, although with more space for hard drives:
I used the following components:
For storage I bought used 4 TB drives from ebay for around 40 € each.
Now the system is running 5 x 4 TB in RAID 6 as well as a 256 SATA SSD I had laying around as cache.
The system is using 25 Watts in idle with those 5 HDDs, 1 SATA SSD and 2 M.2 SSDs.
It’s a bit more you’ve been asking for but this option would offer you more expandability down there road.