That build and the tools in it are super nice and I don't want to rain on anyone's parade, but if that building were here in the SE termites would get in that bottom 2 x 4, go into the rest of the wood, and collapse the building. If it's made from treated lumber it should be ok.
thanks guys ! just a humble little shack i use to get out of the rain, but she does have a place in my heart now... and its a honor to be on the front page, if you have any questions just ask or pm me , thanks agen chris...