Looks like you had great fun. Did not expect otherwise since Budapest is a great city. When I was there I had an Airbnb as well, right in the city center. So great if you don't need transportation all the time. Although we misjudged the walking dinstance sometimes, especially if you want to cross the river. We came from Prague which is a much more 'compact' city in terms of walking distances. Guess we got spoiled overthere =)