Also remember as an international student, at most schools, if you do not apply for financial aid during the admissions process, you will not be eligible for financial aid later.
You are playing a risky game with no recourse, applying ED and not applying for aid.
Your plan for getting in an then getting merit money is not going to work. As an international student, there is no way that you are going to get 280k in merit money (it is going to happen for very few US citizens, that are not recruited athletes at schools that give athletic scholarships).
As the others state if you need aid, apply for aid and let the process play itself out