Here’s the complete list of parts in this bundle, and what I paid for them.
NFC Case: $199
NFC Machined On/Off Switch: $32
NFC Mini Feet: $25
NFC 3D Walnut Bezel: $55
NFC Skywire Cables: $39
HDPLEX 400W HiFi DC-ATX: $95
Dell 330W Brick: $98
$543 w/ out shipping/tax/etc...
How do you figure? I have a similar system (minus 2 hard drives) and it runs fine with the 1070 ti mini. Also, check Josh's BOM's on the website, the HDPLEX400 and 330W dell brick are (one of) the recommended setups for those GPU's.
EDIT: According to pcpartpicker.com, he's around 299W.