I'm pricing a job that includes extending an existing patio. This patio belongs to a one year old town home. My landscape company will do the excavation work and add/compact the gravel, but I'll need someone to come in to form (rectangular with rounded corners) and pour the patio extension. This patio site is about 75' from a service alley, so I assume the work will either be done by wheel barrow or using some sort of tubing. What kind of range can I expect a 180 sq ft job to run in Alabama (just the forming/pouring/finishing, as I'll price the excavation/gravel separately)? Thanks much!