I do not think it would be too hard, but then again it may. I was just thinking how cool it would be to create my own way point run. What I mean is if I am looking for a certain flower, I could take set my way points of where I want to go for farming this flower, save a name for it, and when I am farming for that item I can click on that waypoint run (farming trail) and go farming.
It could be set up to only be set within each area, unless that makes it more complicated. We can set it to loop so when we reach the end it resets and we can follow it again, etc.