My kitchen is upstairs and that is where the children eat. It makes a nice change from being downstairs all the time. Yes, take the kids for walks and look for any green space that the kids could play on. I live behind a store also and sometimes, for a change, the kids will play on the grassy area behind it. They just run around the trees and we play simon says.
The ages of my dck's vary. They are aged 3 and the youngest who is starting in January will be 11 months. I have no problem handling a varied age group and actually prefer it, however, you have to figure out what age groups you can handle. Some providers love all babies and some like the older kids.