Potential food forest

My partner and I have about 20 meter X 20 meter of land in a tropical area.
We are both raw-vegan.

The question is: is this area enough for creating a food forest which can sustain at least 2 people, who rely purely on fruit (about 80% fruit, 10% vegetables and 10% leafy greens)?

So many thanks for your kind help!

You can't know until you try! I think you could grow most of what you need.

Here's an example:

Biointensive vegetable gardening focuses on growing the most vegetables in the least space: http://www.growbiointensive.org/

Thanks Tyler.
Though I'm still wondering; we do eat quite big amounts of especially fruit and greens, daily, and vegetables on some days.
I'm wondering if this amount can be grown in a 1/10 (even after a few years of cultivating).

Here's a Youtube channel with many discussions of how to grow a lot of greens and fruits. The host is a raw vegan, and grows most of his own diet in a small space: [youtube]https://www.youtube.com/user/growingyourgreens[/youtube]

Thank you very much, I'll check it out