There are no other accredited schools in the city which you have not listed. A high school gpa is irrelevant to graduate school applications. Why would you pursue a BFA when you already have one? It is very atypical and not very cost effective to do a second bachelors. It sounds like you need to spend a little more time deciding what you want to do, what your goals are, and how this degree will help you get there. Otherwise you might find yourself in a pile of debt still not sure. Continuing to work in the meant time as you figure that out certainly won't hurt.

No one can tell you if you're qualified for an ivy. Acceptance to any school incredibly subjective. Frankly having an ivy stamp on your resume as an architect doesn't do you much good unless you're already wealthy and plan to immediately open your own practice. It may sound superior but most firms, especially in NYC, couldn't care less about an ivy diploma and some may even avoid hiring such alumni as they tend to be rather pretentious and untrainable. Figure out your long term goals and work from there.

I've worked with a few Columbia historic preservation grads that were uniformly great, and couple of architecture grads that were terrible in an office setting.