I think for now that should be fine. I got daily cloud backups, and got a way to remotely turn off the PC if a disk degrades or faults. I might also even get a disk as hot or cold spare just to be sure. With 2 mirrors I got quite a bit of performance, and in a sense better off than with a single mirror.
I’m using the storage to host Nextcloud, and the performance was just not really good enough with a singular disk of speed. I’m hosting it for me and the wife so we can both share pictures with each other without needing a privacy invasive third party :)