Building a new place to Craft

I Found out recently that I need to vacate my little workshop, so Im going to make another space in the back of my garden. Not the best timing with the run up to Christmas but never mind, it will be great when Ive finished it.
Planning this sort of thing is tricky, especially when space is limited and money is tight, but its the sort of challenge I enjoy once I get going. My Art and Crafts are not the sort of thing you can do at the kitchen table, space to make a mess and be creative as well as down tools and lock up without worrying are features I need. Ive got through so many bits of paper planning it out, changing my mind and planning again. Ill post a picture when done.