

On 1: Autoseeding ISOs over bittorrent is pretty easy, helps strengthening and decentralize community distribution, and makes sure you already have the latest stable locally when you need it.
While a bit more resource intensive (several 100GB), running a full distribution package mirror is very nice if you can justify it. No more waiting for registry sync and package downloads on installs and upgrades. apt-mirror if you are curious.
Otherwise, apt-cacher-ng will at least get you a seamless shared package cache on the local network. Not as resilient but still very helpful in outage scenarios if you have more than one machine with the same dist. Set one to autoupgrade with unattended-upgrades and the packages should be available for the rest, too.
If anyone else is seeing high resource use from seeding: There’s quite some spam and griefing happening to at least Debian and Arch trackers and DHT.
Blocking malicious peers can cut down that by a lot. PeerBanHelper is like a spam filter for torrent clients.
https://github.com/PBH-BTN/PeerBanHelper/blob/dev/README.EN.md