I currently drive a Maruti Suzuki Ertiga and spend approximately ₹15,000–₹20,000 per month on diesel. Most of my trips are solo. I'm considering purchasing a small car whose EMI would offset my diesel expenses, ensuring no additional financial burden.

It seems that you drive over 3,000 km per month, which is significant. While a small EV like the Tata Tiago EV or Tata Punch EV would help offset high fuel costs, they may not be the best for frequent highway drives. Instead, the Maruti Swift stands out for its excellent fuel efficiency. The Hyundai Grand i10 Nios is another good option. To further reduce running costs, consider the CNG variants of these models.