A new growing space?

We live on an old farm that has been converted into a number of houses. Today we were talking to a neighbour about finding space for our tomato plants in our little garden. She mentioned there was some spare land on the farm, hidden behind a garage block, and that nobody had any use for it - and suggested we asked around to see if we could grow veg there. So far, everybody has said yes :-)

Here's the space. It's about 5m by 3m and veeeery over grown.