After running out on my first batch of 10,000 pavers from Acme Brick in Texas, I had to go to another supplier in Mexico. The quality was sub par and about half were defective so I bought twice as many, a discount was given after I brought back several pallets but then they told me just to keep them. I was able to use the defective ones whenever I did not need a full paver. In the end I had several pallets left over.
The job is easy if you compact the soil (preferably gravel then coarse sand) before you lay the pavers and have a good cement boarder. Divide the project into sections each surrounded by a cement boarder about 8-12 inches wide and no more than about 1,200 pavers. There are pavers made to walk on and pavers made to drive on, be sure to use the appropriate paver. The pavers are made to either have a gap or lay touching each other (knobs and tampered). If you can, get the ones that butt up against each other. I used the straight edge pavers that required a quarter inch gap and cut about 50,000 small styrofoam spacers before applying the setting paver sand in-between the pavers. I'm going to have to rest now the memories are making me tired.