Given your yearly running, a petrol SUV would make more sense as you won't be able to offset the upfront extra cost you would be paying for the diesel version.
The Hyundai Alcazar is a comfortable and easy-to-drive SUV that has a good petrol engine and a convenient automatic gearbox as well. It's not as large as the other SUVs mentioned here, and that makes it easier and lighter to maneuver in the city.
The seat height is also at a reasonable position, so getting in and out will not be difficult, especially for the elderly. The Alcazar would be our top recommendation here.

