Replacement is the remedy for worst of the worst scenario and as a last resort. If no way out and replacement is the only option then it would cost him 12-13K Rs which would definitely be a burden so prior this he can try a repair remedy provided original ultraviolet sealant coupled with a true professional treat the crack.
Its been couple of months that I had got treated my wagonrz windshield crack about more than a feet long from left hand side towards right hand side and in the middle, Alhamdolillah its movement is stopped and have taken my vehicle to 170 couple of times. Want to save him from a big loss with safety. Allah forbid if he couldnt get any benefit, replacement is there but it would not only cost him a huge amount but would also consume his time plus a replaced windshield may attract objections in future incase he wants to sell the vehicle and if any potential buyer noticed that.