My wife was invited to the wedding of our Qatari neighbour's (Ahmed Hassan Bilal) daughter and was told by a reliable source that if she couldn't afford something expensive as a present don't bother as it's the cost that counts....not the thought.
She was avised to take a good sized bouquet of flowers for the brides mother.
They had called in a dance troupe from Bahrain for the wedding and my Mrs was astounded when the local women began touching QR notes on the dancers foreheads and throwing the notes on the floor. There was QR 65,000 on the floor at the end of the night. Next time she gets an invite she wears spikes!