[fivethirty]

I won't call you over-cautious, but I submit that it's much much cheaper to travel around the world for an extended period of time that you might imagine depending on where you go (i.e. Thailand = cheap, Iceland = not cheap) and how comfortable you are working odd jobs and/or staying at strangers' houses. I traveled literally around the world a couple of years ago (albeit for months, not years) and spent far less than I do living as I do now in the Bay Area, plane tickets included.