Sure, you could sell the trees and people would buy them. Or, you could create a new job involving:
-New Tool (Axe)
-Forest Level
-Lumberjack NPC
The lumberjack would give you an axe to cut down trees for him with. After a certain amount of trees cut down he will give you a tree for your house. After the tree reward you would cut down trees for gralats. Oh Tyler cutting down trees is boring, couldn't there be something to make it more interesting? Yes, how does pissing off wild animals living in the trees sound? Certain trees have wild life such as squirrels living in them and if you cut that tree you will be attacked by them and lose .5 health and can't cut down that tree.