Years ago I met a guy that mentioned he had a bbl. of motor oil he wanted to sell. I told him I'd stop by and have a look at it. Anyway, once there, he pointed to his barn and said "it's up stairs in the barn, you have to get up there with a ladder, through that door" while pointing at it. I looked where he was pointing, and there was already a ladder there, so up I went.
The upstairs was FULL of "stuff", including the 55 gallon bbl of oil, and after looking the bbl over, I noticed the whole damn barn was built out of pallets and covered with pole barn steel. I was amazed how well it was built and it was straight and looked square, this was a bigger two story barn too, not some smaller garden shed. I asked him if it was nailed together? He said he used an Grizzly brand "air nailer" to put the whole barn together, and the pallets were all free...
I never would have believed it, if I had not seen it myself...
SR