I am not now nor have I been a student at UDC.
But I have lived and worked in the DC area for the last 15 years. Yes, cost of living is quite high compared to many parts of the country, and that is something that anyone considering going to UDC should consider. As for if the school is "worth it", I guess it would depend mostly on the student.
On the down side, there are no shortage of Law Schools in the greater DC area (Georgtown, GW, GMU, American, Howard, CU) arguably each of these other schools have bigger more reconizable names, and as a graduate you need to be aware that you may find yourself fighting to get out of the shadow of these other schools.
On the bright side, this school, even for those who are paying full freight, non-resident tuition, is the most affordable law program in the region. The campus is accessiable bia a reasonably good transit system (the Metro), which increases the flexiablity in gaining access to various city resources (and for those with an interest in the law, you can do far worse than DC for a city to emerse yourself into the study of law).
Good luck with whatever path you should choose.