If offsetting the time and transport costs, there is anothet angle to look into.
I currently only split the week with the homie picking up the 5gal or so of coffee from a local place and the other gets it from another shop for backyard projects like hot composting, worm stuff, etc, and have got the go ahead from a restaurant on getting there veggies in the future as I am upgrading my composting infrastructure and have been considering the time and labor element seriously because I have two jobs and two kids and a lot on my plate, so minimizing the time drain I am considering.
We have been locating various sources in the town and its outskirts where materials could be located, such as hundreds of buckets or barrels from the juice plant, spent grain wash, wood chips from the tree places, carting the vegetable matter from restaurants etc and making casual inquiries about what they do with it. In most cases unfortunately they throw everything away on site or take it to a local dump. One tree place lets anyone take it for free or haul it to local cattle yards which need the chips to lessen the nitrate poisoning of the water, but I know smaller operations that just take wood chips to the dump and actually pay to waste it.
As our operation grows, I intend to first make it known that they can dump suitable material for free at our site, which may be beneficial to them to reduce garbage costs, or post on craiglist and local fb groups that clean yard waste can be dumped at our site. This way there could potentially some matter dropped off without taking up my time. As for charging, one thing to consider is how important reliability is. Not picking up for a few days can cause some nasty backup, if its just a couple dudes and someone gets sick it can cause problems for a business, so some may prefer something good and established. If you have something to show for it, such as a years old composting operation you can assure them you can get the job done right. So at this point I am not pursuing charging because I don't have the humanpower or organization to handle the quantity or consistently haul the matter, but if and when I get to that point, I would try learn what they pay to get rid of their organic matter and offer the service at a lower cost. Financial incentives drive a lot of business decisions, so making paying us a better financial decision than using the dumpster can get the attention to those not driven by altruistic principles. Making environmentally friendly practices financially beneficial can help to change the minds of those in the periphery of industrial agriculture and who otherwise reject sustainability as some liberal-ISIL conspiracy and the environmental benefit is just welcome collateral.
At this point I cannot yet charge, but what I would charge would be metered against what it saves them, not what it costs me.