Google Earth the school, see for yourself what the maintenance and grounds people know about irrigation.
They want the job done ASAP?, of course they do. Football practice should begin in 2-4 weeks, they can practice anywhere but the season should begin by mid Sept.
I have worked for enough school districts to be wary of anything that is said, who claims to be in charge and all promises that are made by the district reps.
Odds are you will be strung out on your final payment, so make that payment profit only.
I have found that the quality of your work will be the same, regardless of your lack of experience with larger pipe and flows, you'll figure it out while maintaining your standards.
I wish you luck with the project.
Posted via Mobile Device