How much land do I need?

I need land big enough to hold 4(or 2) big trees, 2 humans, a well, and some space to plant vegetables. I do not mind being dependant on the socio-economic network to provide me with the essentials and luxuries but I need a backup just in case the whole system breaks down. I don't want to be a part of the mayhem when water becomes a very scarce commodity and people everywhere, especially in the cities fight over it.
I want a mango tree with a nice canopy, a small house made of wood. Thodi si zameen, thoda aasmaan, thinko ka bas ek aashiya...I will reap my freedom on this land, it will give me my piece of sky and my share of stars and the moon too.