Damn that's a lot of concrete. I bet stamped cost you over $10,000. My dad and I poured a 4 yard batch for a neighbor and I gave my labor for free. $1,200 for easily$2,000 worth, with no license, tax or business costs. You're talking 14 yards plus the stamping. Well done kid.
Every time I have had cement work done in the last few years I am shocked how much companies are trying to charge. I have a small area in my backyard I wanted some cement poured for a hot tub pad and the quotes I got from a few companies made me laugh at them. Ill just do it myself this summer for 1/10 of the price.