While the Razor Core is connected and its booting up..it hangs and it performs a kernel dump. I attached a screenshot of it.
I tried adding the boot argument that you mention and got the same result, it hangs while booting.
Also when it successfully boots without the eGPU. I connect the eGPU to the NUC and the mouse cursor freezes completely, the fan ramps up to high and the HDD activity lights begins to flash continously. I have to unplug the eGPU and do a manual reboot to get Mac OS working again. Thanks for your help with this.