For scale: at difficulty 148.36e12 (own node reading, 31 October, 19:29 CET) one block costs about 6.4e23 hashes on average. A 1 TH/s box therefore needs roughly 20,000 years per block. Hitting one inside a single day is roughly one in 7.4 million at that hash rate. Payout is the same 3.125 BTC for everyone, so expected sats per hash do not care whether you run one Bitaxe or a warehouse. Only the variance changes. That is the scary part: the odds do not care how long you have been trying either.