If I had home in Ktm and even a job with Rs 15000 per month (which is government officer's basic salary and obviously not sufficient even to pay the rent if you have to), I would go back and take the offer. You already know the world. USA is not dream to take a step anymore and you have precious degree. After sometime you may feel bad as you will be frustrated with the system but it may not take time to adapt to those conditions where you were before.

Good luck!