Jen, i sympathize with your situation. I certainly understand mobility difficulties. I'll come up with some more urban-doable challenges. There are many people, young and old, who have mobility difficulties - video astronomy is a great way that helps many people participate in astronomy, and at minimal cost
That's given me an idea for this last Challenge...
Challenge No. 6.1...
Uranus & Neptune using binos or small aperture under urban skies.
Following on from Jen's post, I don't see why I cannot modify my challenges. Both Uranus and Neptune can be tricky to pin under urban skies, so have a crack with your binos, small scope or evdn just your finderscope!
Alex.