Neither India nor Pakistan can sustain a conventional war for more than 2 weeks, as they do not have sufficient armaments. Both sides also lack an effective defence against short-range missiles and drones. If the situation deteriorates, it can quickly lead to nuclear war as nonrational actors are present on both sides. I hope this situation does not escalate further. Please note that in a conventional war, economic costs of India would far outweigh those of Pakistan, whose economy is much smaller.