We saty 3 days in the nice little house of Michelle and Elmar. Michelle is very reactive and helpful. The appartement is very well located for a short or long stay in Washington from 30 minutes by walk to the mole and quickly by bus or metro. It's also very easy to park very close to the house and for free thanks to a visitor parking permit delivred by Michelle.
The two-stage house is perfect and nthere is all we need.
I recommend a lot this house for your stay in Wawhsington DC.