Cornell College is in Iowa, with a cost around 71k/year. If you are referring to the Ivy League school Cornell University, it will cost over 90k/year if you are not eligible for financial aid. You need to run the Net Price Calculators at every school you plan on applying to, especially your ED2 choice.
To get to a budget of 25k/year, you need to look at schools that offer big merit money. There are others here who can offer some suggestions.
FWIW, the Germany option is looking like a strong choice if you have budget issues at U.S. schools. Just my opinion.