NO!! the contactor wasnt being smart,, he just doesn't do commercial installations what so ever.
Yes he needs to know water pressure etc.. like you indicated...because thats what determines all your above
But you mean tell me there is no one bidding on new commercial jobs out there untill the project is completed and established???,,,thats impossible...!!!!!
These landscape installation jobs start with having to submitt a bid to the GC which includes the irrigation work.
You cant leave it blank or open, nor wait to the project is up and ready, you have to submitt a proposal meaning one has to come up with somekind of a close figure
Im the one who bidded on the entire project (which included irrigation) and was going to sub contract it out
I needed a freekin number to work with which I never got
Im the one who was taking the risk