They probably factored RAID1 into that price, which you can skip if you're setting up three copies. (At least I hope they did, their hardware prices must be dire if $2000 only gets you a tiny NAS and two 10TB drives.) If I do napkin math based on US prices, a mini PC and a 20TB external drive are $500 total, so that's $1500 for the triple-NAS option and $3000/year for the S3 infrequent access option. Still extremely compelling.