I lived in Amman about 15 yrs ago, the cost of living is cheaper there comparing to Doha, also it depends on where you live in Amman, and where you will stay in Doha. As other posts say, Doha is quite an expensive city to live in, you will need 700$ just for shopping, think about other expenses as children school, buying a car, medical cover....etc. if your husband can find a job here that will make it possible. All the best.