Why would I use inputs, when I can feed a mixed herd of goats, sheep, chickens and pigs to eat your rose and wild parsnip and turn it into food for my family, neighbors and community? But sure, if you want to pay me, I will take payment. At the end of my herd's eating and working your soil, you'll have plenty of manure, green manure (ultimately), and should be ready for planting whatever you want. This is exactly what I do with wild parsnip today. I don't eradicate multiflora rose, but instead, propagate it where I can. My hives work it with great delight, and it makes an unbelievable-tasting honey. Obviously, its also a great edible for us humans, and makes a fantastic tea.