Dude,
The project is running for 24 years already and has cost you over $5 billions. I'm not sure if its wise to continue the development.
.
Where did you get that figure from?
in May 1989 the program was projected by the government's review committee to cost Rs. 5,600 crores.....by the end of 2000, the total Phase 1 cost had risen to about Rs. 3,000 crores....When FSED Phase 2 was launched in November 2001, it was authorised under a budget of Rs. 3,302 crores (about US $704 million)
http://en.wikipedia.org/wiki/HAL_Tejas
that is around 1.3 -1.5 billion. A 4 gen FBW,with composite structure,advanced avonics and ecm fighter, with possibly Indian radar(on the way) and a industry to support it... I would say it is worth it. We had to start someday.