It would most likely be cheaper if he checked with, and hired a local landscaper or handyman to do the whole job. Especially if he's accumulated enough crap to have to rent a truck, in order to get rid of all of it in the first place.
Many of these guys work very reasonably, and advertise in the local shopper rags you can pick up free at the grocery stores in the neighborhood.
By the time you do the job, rent the truck, load all the crap, and haul it to the landfill and pay the fee, then clean out the truck before you take it back. And calculate your labor at minimum wage, he probably paid more.
I used to do all of my own trimming and landscape work, until I got smart and realized I was working for peanuts. This reminds me of these people with appliances all roped up, sticking out of their sagging compact hatchbacks, ready to fall out. All trying to save a $50.00 delivery fee at Lowe's.