Being a solo miner is a bet on luck, and it cannot be sustainable. If you are very lucky, you will get $200,000 once, and then you may continue to operate the machine for several weeks or years without achieving anything. You may not be so lucky and lose everything.

The majority will choose to join a mining pool, and then you will have the options of PPS, FPPS, PPLNS, PPS+, and then, with the expenses of electricity, maintenance, and depreciation, you will determine whether mining is profitable for you or not.