Well, I'm not the best person to advise you, since my environment is completely different! However the starting point is the same where ever you are in the world:
Observation - what is growing well near you, what areas get more sun, rain, wind, what creatures visit (good and 'bad'). If you can, watch what happens over a full year or more unless you already know the property well. You can be surprised by what is hidden under the soil or appears only under certain conditions.
What are your resources? what plants are already growing? Even 'weeds' can be useful resources, many are edible or medicinal, they can tell you the properties of the soil you have. At the very least they help soil organisms (which are good) and add organic matter (which is good).
I would then look at zoning: zone 1 being the area that gets the most attention - usually the house and the area that you would pass many times a day, and zone 5 being completely left to nature. and plan out how you want to lay out the plot.
My suspicion is that water management will be your biggest challenge (in terms of successful growing for food in a small area and reducing inputs) so you may want to take a closer look at the 'greening the desert' forums
here.
Hope this helps.