Friends idea stupid or not?

my friend told me that he wants an ASUS X99 Deluxe Motherboardwith a 5960x, running a 2 way sli on gtx titan z's and have an asus RAIDR 240gb pci-e ssd, G.Skill Ripjaws 4 F4-2400C15Q-32GRB 32GB (4x8GB) DDR4, Samsung 850 PRO Series 1TB SSD, and 4 seagate ST4000DX001 Desktop SSHD 4TB in raid 10, and a custom watercooling system, he does lots of hardcore editing and gaming, is this a reasonable build for him or is it overkill? he does do 3d uhd editing and rendering so im not sure the ideal specs for that level of work

why not ditch the titan Zs and get a workstation grade card? it will perform better for marginally higher cost. And as for hard drives, he would probably be better off building a NAS, instead of having so many hard drives in his system. 

Must have heaps of cash so why not go all out. Even a dual 2011 socket workstation board if his pockets are really deep.

I would rock an Asus or as rock WS mono for all those sata port to raid some ssds instead of the PCIe ssd for redundancy and speed. The Asrock one has a LSI controller.

thanks, would workstation cards work just as well for gaming? he wants his pc for editing and gaming

Workstation cards are incredibly bad for gaming - the drivers just are geared only towards productivity.  I'd recommend going with a high end gaming GPU if he wants to both game and edit.

ok, thank you