This workbench is simple enough and cheap enough that you can make it in a morning, and yet it's big enough for serious woodworking and hobby projects. Add pegboard, a bench vise and a few other accessories and you'll have a serious work center.
A Shed or outhouse is vital for anyone considering a self-sufficient lifestyle. Tools need a safe, dry environment, and it is also essential to have a cool dark location to over-winter crops such as apples. Sheds and other garden buldings can be purchased relatively cheaply (e.g. from just £99 for a 6 x 4 foot model)