I have been in business since 1995, but we have only done 1 install before, and it was at a factory. Most of our work is landscape, and lawn work. I thought for our first one it was a big installation job. 1 1/2 main line with 1 inch laterals coming off that. 8 zones. 8 years later getting ready to give an estimate for a residential system. Depending on volume shouldn't be but 6 or less zones at the most I would think. I am faxing off the property blueprints to an irrigation designer for the materials list, but I am unsure of the amount of time that will be required to do the install. Last time we used sch 40 and a bobcat trencher to bury the lines. I am not asking a price to charge for the job, because my labor rates are not the same as yours, but rather how many man hours it might take to do the job. I know that there are a few variables on the installation that could change things. Any help with this is immensly appreciated. Thank you please pm me.