Do you even know the development cost of Akash SAM and the others in its category?? Also when you are not given anything and when you are banned and when your government doesnot support, its a hard thing to achieve. Just look now how quickly they are gonna build Akash mk2.
Here take a look at some points about Akash SAM.
1. The Akash Missile Development cost of 1,000crore ($200 million), including the project sanction of 600 crore ($120 million), is 8-10 times lower than the cost of similar system developments in other countries.
2. Akash has certain unique characteristics like mobility, all-the-way-powered flight till target interception, multiple target handling, digitally-coded command guidance and fully automatic operation.
3. This system is claimed to be more accurate than the MIM-104 Patriot as it has thrust during the entire course of its flight compared to the Patriot that has thrust only for the first 12 seconds, after which the missile coasts, thus making it less accurate.
4. Apart from that the Akash can be launched from static or mobile platforms, including a battle tank.
5. Along with India, a limited number of other countries including the US, Russia, Japan, Israel, and some EU countries have developed operational multitarget-handling surface-to-air missile systems.
6. Flight altitude : 18 km, Speed : Mach 2.5
I hope now you can appreciate what is achieved here.