There are quite a few 7-seater options under Rs 15 lakh, and it's hard to pinpoint one without knowing your specific requirements. Thus, we would recommend the Maruti Suzuki Ertiga or its sister car, the Toyota Rumion, as they are very good all-rounders. The third row is quite spacious, and moreover at your budget you will get a decently equipped one too.

The Tata Punch, which has recently been given a thorough update, is a good option to consider. It has a high seating position, great outward visibility and a relatively spacious cabin, while being compact and easy to manage in traffic. The high-set seats will also make getting in and out much easier for your wife. The ride quality is also good, and the Punch is comfortable over bad roads, with excellent ground clearance.The Punch is available with a CNG option, which will further reduce your running costs, or even a new turbocharged petrol engine, but given your limited usage, perhaps the standard petrol version will suffice. If you want further convenience, this Tata car can also be had with an AMT automatic gearbox option.

The Kia Seltos HTE(O) is the pick of the three models on your shortlist. Its engine and gearbox (shared with the Creta) are very smooth and refined, and what also sets it apart is its spacious cabin, which is the roomiest of the three.This Kia car also delivers the best ride comfort of the three SUVs. The HTE(O) gets its share of goodies, too, like a slick 10.25-inch touchscreen and digital dials, and will make you feel like you got the most for your money.

For a monthly usage of 2000km, a hybrid option would be cost-effective. You could consider the Toyota Urban Cruiser Hyryder, Maruti Suzuki Victoris, or Maruti Grand Vitara, all of which share their underpinnings and feature-set. Besides being very fuel-efficient, these cars are equipped with all the modern features like ventilated seats, panoramic sunroof, 360-degree camera, etc., with the only missing feature being ADAS.The only differentiating factor between the three cars is their looks and interior colour theme, so pick the one that attracts you.