http://www.amazon.co.uk/New-Complete-Boo...942&sr=1-12

This is a great starter book for this sort of thing. You can do a lot with an acre. The key issue to remember is that if you start it will take a while (3-5 yrs probably) to get things up and running properly - a lot of people imagine they can just start up the day after teotwawki but you really can't