The cost of electricity is one of the main factors of profitability. At a high tariff, even an effective ASIC can work at a disadvantage. It is important to clarify local rules: in some regions, the use of a household network for mining is limited or treated as commercial consumption with different tariffs.
Home mining puts a strain on wiring and heat: you need power reserves and good ventilation. Large miners often place equipment in data centers or in places with cheap energy (hydroelectric power plants, excess wind/solar power).
Before starting, you should calculate: income per day minus electricity consumption at your tariff. If the difference is negative or close to zero, mining at home may not be profitable.