Apply to Wharton because you want a career in business or as an entrepreneur. Wharton is not a stepping stone to CS, BME, etc. And Finance isn’t Econ- if you want to study econ, apply to Arts and Sciences.
There is both randomness and desperation in your posts- and fortunately, you have time to address both those things. Re: demonstrated interest- how hard is it to show interest in a school you are really excited about? And if you can’t get excited- why apply?
Why not start at the beginning- what you are looking for (doesn’t need to be a specific major), what you can afford, and go from there? Taking a Random Walk (look it up; the seminal work on how markets operate-- if you don’t find the book fascinating, don’t apply to Wharton) through top 20 colleges seems like a poor way to pick a college.