In Serbia, it is kinda profitable anyway due to the low cost of electric power. This really depends on how much you make vs how much you pay.
If you paid for example 1000 and got like 2 pcs that mine 3$ in total per day, you will need a year to recover your cost and pay for the electric bill, and after that, lets say your cost of the yearly electrical bill only for the miners will cost is 150, so this is the kind of 2 years earning possibility:
-1000$ (PC)
-300$(2-Years Electric Bill)
+2x365x3$ = 2190$
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2190$ - 1300$=890$ profit
Now does this mean it is going to be only 890$?
No, because mining isn't a fixed income, that means one day it could be 1$, and another day it could be 7$ worth of mining. Including that the bitcoin is also going up and down the profit is hard to calculate.
So for example there are a few possibilities.
2 Years Low Price that Rises, aka 890$ profit is doubled or tripled due to the rise of the bitcoin or the possibility that the bitcoin falls and it is worth half of the 890$.
In a way it is a gamble, but if you get informed you can earn for sure out of it. I am mining it and will hold onto my earnings for a year or few when the bitcoin reaches 36k, then I will sell it.