

One way to avoid the pitfalls of hosting for others is hosting an instance just for yourself. Maybe immediate family too.
As for RAID, just go with TrueNAS software raid (courtesy of ZFS). All that is needed are physical bays and SATA cables/ports. You can buy cheap external bays if there aren’t enough on the PC.
YEE-HAAAW!
Wait, what?
Tap for spoiler
/s of course.