Design, developing and manufacturing automobiles is not a difficult thing. But here in India in order to get road worthiness, we have to get an ARAI/VRDE/iCAT certification which is very time consuming and costly.
[ARAI AIS standards
Design should have to follow AIS standards, Developing should follow BIS standards and manufacturing should follow ISO TS-16949. Over all IMDS material % data is very important.
To have official approval, your designed vehicle will have to under go crash & impact tests. These test have a long pre-booking dates by OEM
's since new safety standards will have to be followed from OCT-2017. As per my idea, each test costs around 3-4L + their services costs.
Power, too much g-forces, no comfort for tall (for me), looks.
Best example to be a huge customer base would be like baleno. Has premium looks but still cheap. For me, even more awesome would be something like a 4 door thar with current thar dimensions.
As @akash1886 said, electric and hybrids are the need of the hour. Hybrids are more suitable for India, because we can't be sure when electricity will be out especially when travelling to other states.
Above things mentioned is for a inter-transportation people mover vehicle. However for intra-transportation best example would be like a (electric) golf cart.
For a intra transportation vehicle, you don't have to follow all those rules. Just some simple ones. Since it's an intra transportation you don't even need a road worthiness certificate.