@schank23 -- Thanks! I'm hoping to inspire others to make great cheap terrain themselves. Please, copy anything and everything.
@Theophony -- Thanks! I'm just sort of following the old Necromunda terrain for the ladder placement, but have no fear, I have another building in the works with a more conventional ladder placement.
-------------------------
Here is the basic structure of the three can liquid storage terrain piece.
Here you can see that I used strips of cereal box cardboard to hide the corrugations in the box cardboard.
Here's a side shot of the storage tanks so far. I added ladders to both sides and put some surface detail on the top in the form of circular access panels with big rivet-bolt-things.
Here's a close up of the lids on top.
Here is a good shot of everything that I accomplished. This was a really simple piece to make, but I think it has a nice overall look. I'm planning on making another one to help extend the industrial theme of this terrain set.