The op made the mention of the sod cost as well. They may be doing the irrigation very discounted to get the other work. Also I'v seen the national providers install a job at 1-2% profit only to get the maintenance, spraying and Enhancement work that operated on much inflated margins. If it was only your 2nd system and you didnt get it. It may be a blessing disguise. And in my opinion if I was relying on my "irrigation guy" to guide me that in itself would make me very nervous you need to know whats going on mot rely on an employee that is app to call in sick, want a raise or quit, then there goes your irrigation dept.