If you don't mind spending $3,000 on the lottery, you can buy this model for solo mining and mine for more than 1 year.
Buying this model to recoup your investment in 2 years or more makes no sense.
buying a miner like this only makes sense if you want a space heater.
now you may need a space heater then this is okay.
my 1 card / hashboard
s19 pro
s19xp
t21
are better if you need a space heater as they are cheaper and can do 500 to 1000watts
the pro does 28th. about 29 watts a th
the xp does 35th. about 23 watts a th
the t21 does 50th. about 20watts a th