My family of 4 which includes 2 kids ages 11 and 13 is traveling to D.C. in the early summer. We are hoping to find a self-catering unit that is close to the metro. I am wondering if anyone could share local insights into the Columbia Heights, Dupont Circle or Capitol Hill areas, specifically whether they would be a good home base for a family who will be spending 5 days or so? We plan to visit the monuments at the National Mall, the Holocaust Museum, the Air & Space Museum and other Smithsonian institutions (haven't mapped this all out). I don't think there are any rentals in our budget (approx. $200 / night) truly within walking distance of most of these attractions, so a neighborhood's proximity to the Metro lines and having some dining / retail options in it would be a big plus. And we're looking for someplace safe. I would appreciate any insights. Thank you!