I'll be visiting with my husband, 3 preschool kids (ages 6, 3, and 3 months) and 2 grandparents, one of whom has moderately limited mobility - i.e. she doesn't use a cane/walker/wheelchair but can't walk more than about 1/4-1/2 mile at a time without a rest and has a hard time with stairs. I'd really prefer a vacation rental where we could all stay together and walk to the mall area (and drop grandma off or have her take a short taxi ride if needed) rather than lugging the whole crew to/from the Metro every time we want to go somewhere. But - I'm not familiar with the area and I can't tell based on the vacation rentals options online what areas are within "walking distance" (maybe 15 minute walk). Any suggestions on a vacation rental or a suite hotel (with separate bedroom) within walking distance? Budget is $500/night and we'd need at least 2 bedrooms (preferably 3) or 2 separate hotel rooms. Thanks!