Borrow or buy some goats, tether them next to the bushes
Goats.
My goats have eradicated all blackberry bushes on my fence lines.
I live on a rural, gravel road. People buy goats and let them roam.
These critters are so cute.
The Omaha Zoo used to give goats away due to inbreeding concerns. Knew a guy who did exactly what you suggested in his timber to knock down poison ivy. There’s several businesses around that bring herds of goats to construction, interstate sites and pen them in to knock down overgrowth. Goats are eating machines.