Try calling a local redi-mix plant and see if they can recommend a contractor. And, find a contractor who only does concrete work, or better yet, only flatwork. Up here, few contractors do both walls and flatwork. I grew up with concrete; my dad had a poured wall company for 30 years and then I go and marry a plant manager. If I lived closer, I would do your yard. I am quite good at flatwork,...for a girl.