Not that one, I think, since you either stripe the disks or they are presented separately. I'm not sure if you can saturate the USB connection with that setup, and there is zero redundancy.Not at all necessarily home-brewed: https://www.amazon.com/dp/B078YQHWYW/?tag=snbforums-20
He had Raid5 5.5TB which implies 4 2TB disks. I sorta get using that connected to a workstation for video editing or database use. I just don't get the use case of spending $350 on drives, and $150 for a 4bay USB raid box, and then plugging it into a router. For that amount of money you can get a real NAS setup with snapshotting, replicating, remote backup, cloud services and plex server with transcoding. Along the way, you can certainly saturate the 1gbps ethernet in both directions.
When I had a 4TB drive connected to my 87U, I could get up to 550mpbs read speeds over the network. From my NAS I can get over 900 both ways with 4 drives (mirrored as 2).
Way off topic, I know. Still think USB2 with a normal form factor is the way to go for a router stick.