I am looking for some advice about estimating patio paver construction. I am fairly new to the bidding process for this type of work. I am figuring around $4.00 sq ft for the materials (using Belgard Cambridge cobbles @ 1.75 Sq Ft). I am just not sure how to bid the prep and install portion. One of my suppliers said he heard that $10-12 per sq ft (total of $14-16 sq ft total w/ materials) was the going rate, but that seems a bit high to me. Any advice in this area would be extremely helpful. I would like to get the job but I don't want to shoot myself in the foot either.