I've been looking into doing something similar for an offsite backup for my extensive photo collection- how much storage do you have and how much did it cost you?
I opted for a tiny little 2.5" drive version with 4 bays so currently it's limited to 8tb for now, they do 2 - 8 bay units for 3.5" drives which is probably more suitable for massive storage requirements, and with USB3 ports you can attach additional terabytes effortlessly. They also have additional devices to put even more drives in that extend your NAS storage.
One very cool part is it has sync software that can automatically sync all or some of your stuff - one way or bidirectional - to dropbox, google drive, backblaze, amazon glacier etc for backups and public access.
There's a fork of their software here to install on other devices too - https://xpenology.me
$280 with separate drives - https://www.amazon.com/Synology-DS416slim-NAS-DiskStation/dp...
One very cool part is it has sync software that can automatically sync all or some of your stuff - one way or bidirectional - to dropbox, google drive, backblaze, amazon glacier etc for backups and public access.
There's a fork of their software here to install on other devices too - https://xpenology.me