I'm just going by the wording of your post "you convinced them to book a monorail resort". If it were me, I'd never attempt to convince someone paying for my trip that we should stay at the most expensive resort in the first place. And, if I found a great price for a good place (i.e. $99 for the Hilton) I would definitely suggest that we switch to that.
If it had been your parents insisting on the monorail resort in the first place, I might feel somewhat differently (though I would still mention the Hilton offer to them).
If it had been your parents insisting on the monorail resort in the first place, I might feel somewhat differently (though I would still mention the Hilton offer to them).
