|Subject: re: Round The World Budget|
A year ago the Los Angeles Times featured a series of articles from a couple who did exactly what you and your wife are planning. They went on a round the worldwalkabout for a year. You can read about the places they visited and the style of travel they chose (definitely backpacker style) at this url - http://www.latimes.com/travel/wander/
You can read specifically their reflective summary of what they did right and wrong as well as their budget at http://www.latimes.com/travel/wander/t000124287.html
In total they spent over $51,000. But I recommend that you read some of their travel stories so that you can get a sense of the trade offs that they made on the road.
Mark Los Angeles, CA