Are you going to use hardware RAID or do you have some specific software RAID server in mind (like unRAID)?
What got me interested in home-labbing was to be able to play with software RAID with a bunch of disks, NAS for home use and backing up, and some media serving.
In the end, what scratched my itch was the robustness of TrueNAS Scale (and ZFS itself) and it's user interface. I just love it.
But it does take some tinkering (and learning Linux) to get it working. But I wanted to remember some Linux and now it runs by itself.
I can't imagine how many years it would take to resilver that drive.