I did A Lot of work today. I have zero (0) tools of my own so I asked my dad if he had any clippers. He gave me two sets of handheld pruning shears, I guess not really knowing what I was asking for. (He told me pretty dryly he had power tools like an electric trimmer and weedwhackers when I was done that I could've used) I managed to clear about 75% of the interior run (which is enclosed entirely by the chunnel and a pretty solid gate), with my hands and leetle shears. It was hot. All day crouching, grabbing, and cutting has made me sore, and my thumb doesn't want to do anything and is pretty raw from working the clippers.
I found:
+ x2 3-5gallon metal waterers
+ A water barrel that had been cut in half and used as some sort of trough, although it was much too big and flimsy for chickens so I'm kinda confused on why it was in there at all.
+ A pretty awesome brooder. Like, seriously well-made with really good materials. It had been entirely hidden by the weeds, which were taller than me (5'8"). The plants grew through the hardware cloth and pulled it loose from the staples keeping it in place, but that is an easy fix. This thing is sturdy and I'm SUPER pumped that something so cool and useful was left behind.
I took a break and went back after I had cooled off and decided to tackle a little bit of the tree problem. I couldn't trim as much as I wanted, but I managed to clear out enough so that I didn't have to squeeze by overly-friendly branches to get to the door, which can now also open/close freely.
Pictures of progress below.