One of the most common questions that seem to be posed by potential long term cruisers is “How much does it cost?” Ali and I kept a detailed monthly accounting of our budget during our 3 1/2 year circumnavigation here – http://www.bumfuzzle.com/
Of course, there are plenty of people out there that say it can be done on less, but regardless, this is what it cost us to do it, and from the feedback we’ve gotten it seems to be pretty well in line with the majority of the world cruisers out there.
Anyway, hope you find it useful.
Pat and Ali Schulte