We had a great time in DC and much of that was due to the location of Travis's place. It is a short 5 minute walk to the Capitol Building and across the street from there is the Library of Congress and Supreme Court buildings.
We also walked to the Air and Space Museum which took about 20-30mins (depending on your pace). On another day, we walked to the Natural History Museum and from there to the Washington Monument, WWII, Korean, Vietnam Memorial is another 30mins walk. This basically took all day starting at around 11am (I think the round trip back to the house is 5 miles and some change) and ending with fireworks bc it was 7/4. We have three children 12, 8, and 6 in case anyone is wondering about if their kiddos can do it. We took many breaks under shade and air conditioned areas, drank lots of cold water, carried cooling towels, and took our time every place we went. It was super hot when we were there.
For the White House, we drove to downtown where there was plenty of street parking. We also found parking for the Jefferson Memorial and Holocaust Museum on Maine Ave. (1500 Evens Maine Parking) and street parking on Independence Ave. ( I think we got lucky with this one) for the MLK Jr. Memorial. In short, we did all this by walking or very short drive from Travis's place.
There was street parking right in front and around the place. We stayed there four nights and found parking close to the house every night. Travis provided a parking pass for a small fee. There was also a city bike rental rack a block away which we would have used if all of us knew how to ride bikes! Haha!
Hope this info. helps others. Travis was very easy to work with and his place is exactly as described.