You should give try to affiliate marketing. But it do needs time and money.
They earn from markups on the UPS shipping charges that UPS allows them to keep. They also sell packing materials at a good margin. They even mark up postage stamps (they wanted to charge me $60+ for a $42 roll of stamps; I drove to the post office instead). So there is plenty of money to be made in a good location.Uhaul also pays a commission to them for the business they handle on their behalf.