Should I accept this offer in Qatar?

Recently received an offer from a bank in Qatar with a salary and allowances of QR14,800 + medical + life insurance + return airfare. I have another offer in my home country i.e. in Dhaka, Bangladesh, which is from a multilateral development bank, with salary and benefits of QR10,800 (approx. as converted from BDT) + Medical + yearly Children allowance. Moreover my wife is also working in Dhaka. I'm in a dilemma whether to accept the offer from Qatar or to stay in Dhaka, as i find no short term benefits in the offer from Qatar. What may be the long term benefits of working in qatar?