For Whom the Bell Tolls
Wood Beams and Planks (and a lot of coffee stir sticks!!)
Most of the larger beams are balsa wood.
I bought some at a craft store, but I was also lucky enough to find some at the Dollar store!
I did bought all the balsa available at the Dollar store, so I am sorry if you are the unlucky person would came afterwards 🙁
The planks on the walls and the floor are coffee stir sticks.
When bought in bulk, they cost about a penny per stick.
They look better than popsicle sticks.
Some people use a metal wirebrush to texture wood, but I had limited success with that technique.
I use a somehow blunt eyebrow tweezer to indent the wood. (Maybe it came from the Dollar store or my girlfriend’s stash, I honestly can’t remember).
I also found the tip of a somehow blunt scissors was good for indent the wood.
Tweezer, blunt scissors or the tip of a sculpting tool to indent/carve the wood
Wood stairs 
"dry fitting" the back part of the building with the main base (it's going to be a tall building..)
This is whats up. You have some skillzzzzz