Jiji sorry but your advice is not feasible. There are two separate costs to building an aircraft carier: one is the cost of building the ship itself and the second is the cost of acquiring the know-how and manufacturing base that can turn out aircraft carriers.
Your advise is unfeasible because of the second component. India doesn't have a need for half a dozen carriers. And investing in acquiring manufacturing ability is unfeasible for just one or two carriers.
There is a separate point to be made about indigenising components of the ship re-fitting or the aircraft manufacturing. As the article says, both the Russian and the America proposals include proposals to that effect.
Finally this is not about turning the Indian Ocean into a junk yard. This is about acquiring capabilites that are balanced against our needs. A second hand aircraft carrier fitted with state of the art fighter aircraft will still be a formidable detterent