Resource gathering alternate ideas

[Colonel_Custard]

Im creating a rather large map and cannot fill it with enough doodads without hitting the cap. (I am aware of WEU and the likes)

Can anyone think of a unique or interesting mechanic to gather lumber?
Eg. A lumber 'mine' or a building that generates lumber at timed intervals.

All ideas are welcome.

 

[Kaijyuu]

Regularly spawning ents that give lumber upon being killed.