I'm researching and considering expanding services to include irrigation systems. I'm going to start with my own system this spring. My question is...What are the advantages of a pipe puller over a trencher? Using a sod cutter to remove sod, trenching, install system, and then replace everything is simple enough but will take some time. How much faster is a pipe puller? What happens when you hit rock the size of a basketball with a pipe puller? How do you start and end runs with a pipe puller? I invision using a gas post hole digger at the start and end of each run and when there are joints. I would then use the pipe puller to connect each of the holes. I would also use the post hole digger on every rotor and then clean up with a spade. Please provide feedback on this technique.