Best Bang 4 Buck Mining Rig - How To Build 12x Card 1060 ETH GPU Miner

Merry Christmas and of course an awesome new crypto-year, here a clip of a cool guy building a miner, not really new but a nice clip.

I still don't think mining is profitable, his numbers look good on paper, but in my experience difficulty increases so fast, they never have a great return.
But then I might be wrong, would be interesting to hear your thoughts on mining.