To get Kali to boot into console mode:

(useful on slow and bad hardware such as ARM Raspberry Pi)

Just simply run the following commands:

1: root@kali:~# systemctl get-default
2: root@kali:~# systemctl set-default multi-user.target
3: root@kali:~# sudo reboot

After you reboot, Kali will start in consol mode everytime after this.
To revert these changes, all you have to do is use theres commands:

root@kali:~# systemctl set-default graphical.target
root@kali:~# sudo reboot

After a reboot, Kali will start normaly with GUI login screen everytime again.

Good luck champ!
/cheers