I agree with Shreeya, you will be able to save almost same Tax free is a plus. If you are on a definite contract I think you will get one months salary as Bonus. You can get a unfurnished 2 bed apartment for QR.7500/-Furniture & home appliance for a two bed apartment wont cost more 30K. For a big size car you need top pay around 2.5 to 3K per month.
Food is comparatively cheap for a family of two adults and an infant, you don't need more than QR.2000/- utility bills comes around QR.500/- Phone.. most of us are using Calling cards..PC to Phone which is very cheap. Petrol is damn cheap. Life style is entirely different, very safe place to live, you wont miss India much as you find 1 in 3 people Indian. Just 4 hrs flight to India.

But I think getting a green card is always a plus....Unlike in US you never get a citizenship here. If you own a property here you will get permanent resident status.