RAID IS NOT BACKUP
With that said, depending on the number of disks you intend on having. RAID 5 and 10 might not work out.
RAID 5 requires at least 3 hard drives.
RAID 10 requires at least 4 hard drives. You also lose 50% of the storage.
I would recommend doing your research. I have personally seen a lot of people discourage RAID 5 on 4 disks.
If you cannot afford to lose the data and have at least 4 drives, RAID 10 definitely + cloud/offsite BACKUP.