To Infinity and Beyond!
Design the largest shop you think you could ever use and then DOUBLE the size of the shop.What size shop are building? . I recently purchased 20 acres and trying to decide what size shop to build. Need to have room to store 3 vehicles plus room to work on 3 more.
You "might" be close to what you need by doubling the size of the largest shop you think you would ever need however I doubt it.
Your shop will still be to small!