Yea, what they said...
You're taking on a HUGE task. I know how much difficulty I had just trying to design and install an irriagation system for my front lawn. But what you are undertaking is a whole new level of difficulty.
Add to that the fact you don't appear to understand the basic irrigation principle of head-to-head coverage, you need to either look for an irrigation contractor, or do a whole lot more reading on the subject.
If you really want to do this yourself, I suggest the following reading in addition to the Mitchgo's suggested reading:
Irrigation Tutorials dot COM
Hunter General Irrigation Design Information