I am doing my first patio coming up here in a couple weeks. It is about 350 sq ft of pretty much square with it rounded off at the end. I was thinking about doing it at around $18 a sq ft. with a 4 inch base i would need about 4 1/2 yards of cass 5 and for 2 inches of sand around 2 yards just to be on the safe side. Its for a family friends so im not to concerned about making a bunch of money i just want them to get a good finish product. For all you pros out there in hardscaping do you think im going down the right road on material and pricing? there wont be much for excavation the areas is pretty much flat already just going to have to dig down where the patio is. Any help would be great. Thanks!