I am sure that you wrote the answer by analyzing the data in calculators
Further, you do not consider the cost of taxes, the risks of equipment breakdowns, the cost of renting or equipping the premises.
This question is more complex, so it's better to write a link to a calculator.
I don't like to use mining calculators at all because they can't predict the future. If I buy equipment today, I care about what the profit will be in the next 1-2 years, not what Whattomine says the profit is today. Instead, I like to look at profit data from the past 5 years, like Bitinfocharts.
If anything, tax reduces the cost of equipment and electricity, at least in the U.S. (Section 179). The failure rate of hardware is no more than 4%/year. As for rent, leasing a small warehouse costs extra, but it pays off when you consider the cheaper power as long as you have at least 300 video cards.