Home Automation is building automation for a home, called a smart home or smart house.
While the budget for home automation can vary from person to person depending upon pocket size. It is possible to achieve minimal automation with a budget as low as $15 (1000 INR)
The most minimum and must-have peripheral for home automation is a smart bulb.
You can connect this bulb to your home wifi and control its brightness, color, ON/OFF them using your smartphone or tablet. Another peripheral that is a must-have for home automation is a smart socket.
With these two basic peripherals, you are ready to automate your home.
Adding on to the stack you can do voice commands over google home or Amazon Alexa to control these systems.