#4 Mulch.
Takes a lot of heavy equipment but it’s almost a scam how it works. You get hired to clear a lot of trees and brush. As you clear the trees, you chop them up into tiny pieces. Meanwhile, you charge people to come dump their yard waste to you. You chop up said waste into tiny pieces as well. Then, you charge people to come pick up the pieces so they can use it for their gardens and such.
TL;DR get paid 3 times from 3 different sources to do 1 job.