Based on survival series, films etc. most of the people stranded on a lonely island (not necessarily restricted to this situation of course) over a long period start with agriculture at some point. While I understand that it gives you great benefits, it also consumes resources (water, energy etc.).
When do I know that the benefits outweigh the "waste" of resource (my daily routine is that stable, that it can handle the additional expense), so that I should start with agriculture? Which precedence does it have (like "Don't start with agriculture before you haven't ...")?