K.W.
A couple years ago when I was nannying and had my own, I bought a double umbrella stroller from K-Mart. It was only about $30 (maybe cheaper), and it has been great! It's a bit more substantial than most single umbrella strollers, with some storage on the back and nice shades that go over the top. And it folds down so compact, you can fit it in any car, and it's super light. Unless you're really into a jogging stroller or something, I would highly recommend an umbrella stroller.