I need a little help.

Perhaps I am a little late to the quest or have arrived just in time... that is less important. For the people that play this game more often than I do and have managed to learn the depths of it and its darkest secrets...

For the Invasion of Spots quest / the Jag Quest, how do I manage to get more large leaves, large rocks and underbrushes? Of course their prices are up in the sky because people know how important they are nowadays and so they profit (no judgement, highly understandable... a stud gotta live)

Are there any hacks, life pro tips or perhaps prayers that might help me in this part of the quest?