To add to your decision paralysis, a USB 6 bay DAS is cheap and power efficient solution.

https://blog.patshead.com/2025/06/is-a-4-bay-usb-sata-disk-enclosure-a-good-option-for-your-nas-storage.html

Personally, I have a SSD with a 4-3-1 backup for important files and a 16 TB hdd with a 2-2-0 backup for unimportant files.

Regardless of what you go with, I'd recommend buying less quantity of higher capacity drives (14+ TB) instead of more smaller capacity drives. I'd also make sure you have a backup strategy in place first, and then worry about RAID.

[US] ThirdReality SmartPlug Gen2. It's ZigBee 3.0, power monitoring, power button, UL/ETL certified, and 3reality is part of the works with HomeAssistant program so firmware updates are easy. It's also $10. They work as great repeaters and have improved my ZigBee network.

Most carriers know your name, your internet usage metadata, and your location all the time using cell tower triangulation. There have been multiple reports of phone providers selling location data and sercurity breaches. If you have a phone that provides MAC address randomization and you use a VPN then I think using public WiFi is more private than having your mobile data turned on all the time.