Actually, for the torrents on the first link you just need 20.8 TiB. For the ones on the second link you need 49.6 TiB.

Buying a bunch of disk space isn't impossible. What I don't have is unlimited downloads.

Buy VPS hosting in a place with sane ISPs and unlimited data, then torrent at a responsible rate of like 1MB/s, max ~50 connections. It will take about 694 days to torrent the 60TB at that rate. If you can afford to pay for better bandwidth, say 10MB/s sustained 24/7, it will take only 2-3 months. BitTorrent being what it is, if enough of us torrent it, we should have all chunks between us much sooner than the estimated 2 years, so even when SciHub goes down, we'll be able to piece everything together.