Why would you even bother with bags. Bags are for homeowners, or if just a little is needed. Bags come mismatch, all the plastic bags you have to deal with. I did two jobs with bags when I first started and NEVER again. Your not making no money because for one your customer knows how much a bag of mulch costs. With bulk they don't know, they figure in bulk its more expensive right off the bat. We charge anywhere from 75-125 per yard installed. That includes preen and light bed maintenance. The more premium the mulch the more we charge. If I had a guy pull up at my house with pallets of mulch I would tell them to turn around and go home. Sorry just my opinion. Get a dump or use your pick up and buy bulk and make some money. You'll see a difference. Also you mention wheel barrows. **** you can move twice as much mulch with a wheel barrow the carry bags. Imo bags are for homeowners.