One thing that Metro should do on its own, if it decides to continue studying whether to subsidize a convention center hotel, is to find out what other cities have used the same market consultant to support building a convention center or a hotel, and check whether the consultant's predictions for these other cities have come to pass.
It might be instructive to go read the studies that Denver used to support building its convention center hotel (which I think has 1100 rooms, not quite twice the size of the one proposed for Portland), look at the predictions, and compare them to actual occupancy, before it gets seduced by the projections that it's been given for our hotel. Not, you understand, that I already know what Metro will find.