Pavers are actually quite easy to install and really only require one tool to be rented, a plate compactor. The heavy work is in excavating the area to about 6 and 1/2 inches below grade and moving the dirt. Then you build up the base with crusherun/crush&run which is a crushed stone. Build it up in 2 layers running the compactor over the area. A homeowner can use a 4 foot level and a 2x4 board to help get the crushed stone base to a proper pitch and close to even. Remember that the base should extend about 6" beyond the last paver.
The exact level surface is then done using 3/4" iron pipes. You will need at least 2 pipes. Lay the pipes across the base and check with a level to see if you have the proper grade. Use a little sand to adjust the pipes. With the pipes set, you begin shoveling the sand into the area and with a straight board, you screed (drag) the sand. You are left with a perfectly level surface of sand. As you move along, remove the pipes and fill the gaps with sand. Remember to not walk on the sand once it is screeded.