I am bidding on a job that consists of installing a hedge. Will be Thuja 'Nigra" , 7 to 8' Shrubs. I need to install 147 shrubs at 3' apart for a total of 441 feet. I could go 4' apart but the customer wants an immediate hedge. I will be bringing in a mini excavator to dig the holes and a tractor to haul the trees to the side of the property. The shrubs are about $120.00 for 1. The shrubs total 17,640. I was going to bid total for complete job about 45,000. Was curious if this is too low or just about right?