This is about as much as possible for now I think, if someone makes a monster vacuum cheat that'd be useful for insta completing missions in local co-op and mass farming the items at the same time.
You can transfer saves from the PC version as long as the version matches, and mods should be possible if anyone knows the directory stucture of the game NSP - I failed trying to extract it to find out
Oh it seems branches from trees varies from 5-8 for me so far, I think you get 8 if theres nothing else around the tree at all and branches sell @ 5 each