Georgetown's tuition is substantially lower than other programs. Obviously, there are far more factors in ROI calculations other than just tuition cost, but Georgetown looks a solid option, if you want to work in DC area. You could intern part time during masters, land FT and then finish degree while you work FT.
Georgetown (part time, flexible, 33 units) - 42k
NYU (part time, flexible, 44 units) - variable depending on what load you take, 68k if you take full load (12 units), 80-85k if you take less than full load
Columbia (full time, 1 year) - 79k
MIT (Full time, 1 year, but can extend to 1.5 years) - 74K
USC (Full time - 1 year, part time - 2 years) - 83k
Cornell (Full time - 2 years) - 104k
John Hopkins (Full time - 1 year, part time - 2 years, 36 credits) - 64k full time, 46k part time