I want 100$ per day for bitcoin mining approximately, how much investment in hardware, whats daily expense, here electricity one unit price is 3$.
Learn to use the profit calculator
https://asictrade.com/calc.html/SHA-256/You need to buy 5 ASICs Whatsminer M30S (112TH)
Look at their cost in your country or calculate the cost of analogs. (560TH)
What does
electricity one unit price mean?
The cost of electricity is usually indicated at 1 kilowatt per hour (USD/KWh)
The profit will change depending on the bitcoin price and the hashrate.