VPN on Qubes-Whonix

I am new to using whonix-qubes. I would like to know if it would be smarter Host → VPN → Tor or Host → Tor → VPN?
And what interests me, where is the best place to install the VPN? on the gateway or on the workstation which of the two is the secure variant?

Thanks for your answer… I already read this site but I can’t finde a answere for my question. Can you help me please??