I got a used mini pc to run as a media center, running the arr stack and torrent client that's bound to the VPN interface. For usenet stuff I don't care is it on VPN or not. Its running headless.
If you make sure that the torrent client is set to be bound on the VPN interface, you are fine, if VPN is not up, it should not start, since the interface is not up. For VPN I use wireguard and set the VPN to be brought up by via wg-quick command and use systemd to start it during boot.
You'll be fine using it for personal stuff along with pulling stuff from high seas.