My suggestion is to backup your cloud servers, which are expensive and redundant and have good uplink speeds, to home servers which are cheap and have good down

My suggestion is to backup your cloud servers, which are expensive and redundant and have good uplink speeds, to home servers which are cheap and have good downlink speeds. You don't need your backup file server to be ultra-reliable or even up all the time, so the cheapest possible PC sitting on a home internet connection is a pretty good choice. That way, 3TB is just $150 or so plus your electricity, and it's not a per-month fee.