Queenie poo should turn Buckingham palace into a massive B&B she would make a mint with all the Americans flocking to stay there and she would not need handouts from the British public. LOL
Its not so simple. The Queen and her relatives are legal owners of huge tracts of UK land. If the Royals were cut loose and allowed to charge rent, it would be very expensive. For example, all seashores are owned by the Crown.