I'm currently running a hackintosh with a i7 6700k, 32GB DDR4 RAM, GTX 1080Ti, 4 SSD's. M.2 SSD's are not yet supported on hackintoshes as far as I know, I did not know this upon buying parts and ended up using it for a linux installation.
As for installing a i7 8700k: I'm certain that no kext's are out that support the chipset.
As for installing a i7 8700k: I'm certain that no kext's are out that support the chipset.