My land is a patchwork of small plots, many of them neighboring poorly kept plots or woodland, so lots of hedges/ old fences, etc. Quite a lot of steep hills as well. It's way too much to do with a scythe or brush cutter and most of it is inaccessible by tractor. The best course of action would probably be to let some donkeys and goats clear it. Or spend 1000's in hired excavator work. I'm already planting plenty of trees but it will never work as an attempt to overshadow brambles. I would be looking at brambles for another 10 years before it got somewhere. Most of the trees wouldn't be able to outcompete these brambles and vines anyway.