Thanks for the advice.
In a better economy, I think the suggestion of getting an internship and a part-time job, or a full-time job that's somewhat related, would be great ideas. Unfortunately architecture is being hit hard, and there are no paying internships. I live in NYC, so supporting myself on part-time pay with an unpaid internship is pretty much out of the question.
I know that in order to make myself a more compelling candidate, I would have to take a portfolio prep course either in the summer or fall. Most of them are pretty expensive and I'm lucky that I was offered a chance by my advisor to sit in on one for free. I can't ignore, though, that a better portfolio would just lead to a much more expensive school. I would have been happy to burden myself down with loans had I gotten in to those schools the first time around, but now I've had too much time to think about it, and I'm loving the price of the public school.
So far two professors have recommended that I attend this school, so I'm 90% sure that I'm going in the fall.