Gosh Steve, that's quite an undertaking there. It'll be great when it's all finished though.
My garden is just an untidy jungle...I intend to get out there tomorrow and have a little go at strimming a path to the first pile of rubbish that needs to be cleared. Whether I manage to clear the rubbish is something else. I've got to clear and dispose of the remains of the old chicken run I built out there, which was dismantled in the Autumn after the passing of my last hen.
I know people will say to tackle a bit at a time, but meanwhile the rest keeps growing. Just have to keep doing what you can. We're trying to make this part low maintenance.
We're down to one chicken, but the rats are a problem. May need to take action on that.
Good luck with your garden.