I’d suggest looking at some LACs that are much less selective than Pomona (which accepted 7% last year) but that also promise to meet full demonstrated need. A while ago, I crosschecked the US News list of national LACs with its list of schools that promise to meet full need.
Here are some LACs that say they meet full need and are in the 20s range at US News: Barnard, Bates, Colorado College, Kenyon, Macalester, Oberlin, Scripps, Univ. of Richmond, Wesleyan. And here are ones in the 30s and 40s range: Bryn Mawr, College of the Holy Cross, Connecticut College, Franklin and Marshall, Lafayette, Mount Holyoke, Occidental, Pitzer, Trinity (CT), Union.
I don’t know if any of these are safeties (certainly not those in the 20s), but there should be at least two or three that are pretty solid in economics and political science and where someone with your stats has a reasonably high chance of admittance (way more than 7% anyway, if not much more than 50%).
There are just a few national universities that are outside the top 20 and also on the “meets full need” list. Two are Boston College and Tufts, which could be considered, but they’re not easy to get into. It’s good to have a range of selectivity in your applications, though, and they’d fit in somewhere between Georgetown and GW.
Even if a school says it “meets full need,” by the way, you still have to run the NPCs to see if their opinion of what your parents can pay is way off from your parents’ opinion. That can be a problem.
Also, if you can get into a good school you can afford, I don’t think going to a community college in hopes of transferring to a better school would make any sense at all.