Is it more economical to get a printer vs. printing at costco? Also where can I get the photo paper?

I have found that it is more economical for me to print at Costco. When I tried printing at home and 8x8 LOs came to be about $2/LO. Although I love the convenience of printing at home, its almost as convenient for me to print at Costco because DH can pick it up on his way home from work. Its $1.49 for 8x8 and I usually fit a 4x8 card at the bottom.