@dingchunhua
How do you mine 1 ETH a day?
Currently, around 26.2 GH/s will get you there. An RTX 3080 gives you around 100 MH/s, so this means 262 graphics cards. If you build rigs with 8 cards per rig, then you’d need around 33 mining rigs (which should fit in a small warehouse).
P.S. Those RTX 3080s are currently going for >$2K on ebay, so expect to have to pay around half a million USD just for the cards - and expect to need months to source so many cards.