I would suggest at least 1000 cc car, and accordingly, Wagon R.
It's tried and tested here, regarding durability, firmness and ready availability of spare parts. Locally assembled PKDM Alto has just been recently launched here, and it will take some time for it to build it's market. Regarding durability and firmness, only time will tell, but spare parts will become readily and cheaply available with the passage of some time.