Actually I wouldn't mind paying a year in advance simply because it means I don't have to worry about saving up for that cost and will end up with more free money at the time of the con with no worries about how much I have left to spend after I pay my bill.
Since homewood offers a full kitchen (4 place settings, oven, microwave, dishwasher and fridge) I think I might actually keep the reservation and do the prepay deal in a few months. Being able to keep food on hand there is healthier, more convenient and would negate the extra cost of the room.