You could build a seed box out of a old ARM board running the Transmission daemon and a USB key mounted read only to avoid wear; power draw would be just a few watts and total cost could be less than 50 bucks. The desktop would be needed only when adding torrents or changing configuration from its web interface, although Transmission also has remote control apps running on phones and tablets. If the router permits it, QoS rules can be set up on the router so that the seed box can use all bandwidth, although at lower priority than other machines on the LAN, so that it will never clog the network, which comes handy for example with online gaming.
You could build a seed box out of a old ARM board running the Transmission daemon and a USB key mounted read only to avoid wear; power draw would be just a few watts and total cost could be less than 50 bucks. The desktop would be needed only when adding torrents or changing configuration from its web interface, although Transmission also has remote control apps running on phones and tablets. If the router permits it, QoS rules can be set up on the router so that the seed box can use all bandwidth, although at lower priority than other machines on the LAN, so that it will never clog the network, which comes handy for example with online gaming.
https://transmissionbt.com/