400 OMR (about 85,000-90,000 INR) is a comfortable salary in Oman. Muscat rent for a 2-bedroom is 250-350 OMR. School fees are lower than UAE or Qatar. A family of 3 can save 50-100 OMR/month with employer housing.
Oman's relaxed pace, excellent safety, and lower costs make 400 OMR go further than the equivalent in Dubai or Doha. Many workers describe Oman as the best family destination in the Gulf.