VPN through second NIC

I haven’t started looking into VPN tunneling my torrent daemon but I’ve seen something like gluetun mentioned but I would like for my torrent daemon to use a VPN tunnel out. By just browing a little bit it seems pretty complicated to make it work.

What I’m wondering instead. my truenas is using a double intel NIC and I have two LAN-ports on my pfsense router.

Would it be dumb to configure your second LAN-port on my pfsense router to use as a VPN tunnel and then rout all torrent traffic through the second truenas NIC port (and potentially other applications and even machines on my LAN) to go through the second LAN-port on my pfsense? In my mind it seems quite a bit easier to do, and also sounds like it’s easier to check if you’re traffic actually is connected through the VPN-tunnel.