JHU is a short ride from main frum community in Baltimore, and has an on campus kosher meal plan. The nature of the JHU-Ner “cooperation” seems to be more of JHU allowing its students to transfer credits from Ner under certain circumstances, and Ner allowing some of its students to take JHU (or other college courses). If you look at JHU’s online materials, they don’t see it as a “joint program”. As with most elite universities, JHU meets 100% of need, so tuition is a function of the EFC. Also remember that Baltimore is relatively inexpensive to live in compared to the New York or Washington areas.