Do you need all your files stored under a single drive letter?
Raid 0, one drive dies you might lose all.
With your plenty of photo shooting and processing, what backup system have you in place?
Would you consider a work drive of your 500, and a storage drive for finished work in a large mechanical hd, in any size 4 6 or 8 tb, and an external or second internal of the same size as a backup solution.