Read here here
, especially about the OS Prober.
In General, I would recommend to still use a virtual machine, because for normal everyday use Kali little choice but to reboot back and forth it's sad)) And set to virtula and wind will be as the basis and Kali will be on hand.
UPD. And why do You need 500GB for Kali? 50GB(if we are really in a big way(though again the question why so many?), let it be 100GB)) will be more than eyes, or do You have a passlist over 400GB?))