I learned to bake bread that has sold for 4 $ a loaf from the free Info on the internet.
The comment sections are often as fruitful as the articles them selves!
Our food forest is on a lot we bought outright for 2500 $
Asking price was ten grand.
My latest tree was "acquired" from an overgrown lot.
We can do it! You can do it!

A lot of books about forest gardening (or in general books) are on torrents.

Just type name of the book + torrent and you will find a lot of books this way. If you haven't used torrents before, ask someone who know how to use it, as there is a chance you will download a virus or a malware program...