A viable alternative (if you don't have qualms with this instead) is avocado farming. Depending on climate (i.e., such as colder regions) the net water use can

A viable alternative (if you don't have qualms with this instead) is avocado farming. Depending on climate (i.e., such as colder regions) the net water use can actually be similar (or say 2:1) when switching from eucalyptus to avocados; there still needs to be some amount of research done on this. EDIT: To be clear, in warmer microclimates the irrigation is more water intensive because your loss of water due to irrigation is high. Some advances such as drip irrigation can mitigate this, and in theory things like mulching and super absorbent materials can get the water use down even further.