Low Cost Playgrounds

Some favorable playgrounds which have lower cost of living are:
1) Thailand
2) China
3) Malaysia
4) Indonesia
5) India
6) Philippines
7) Vietnam
8) Cambodia
9) Laos
10) South and Central American countries

If you leave the #10 out, the rest are:
a) big enough for you to explore a lifetime
b) near to one another so not costly to travel from another

If you like this group of countries (#1 to 9), then you could survive on US$10,000/y as of 2009. With 9 countries to choose from, you can plan your time in a calendar year to easily to fit into the VISA rules' constraints. Averagely, you need only a 1-month VISA from each country ONCE each year if you plan to visit each ONCE only. But you could visit many of these countries more than once each year, after some months away. So, theoretically, with these 9 countries to choose from, you should always be able to get a VISA from one of these at any time in a year.

Even better for nomads is this region also has the best of everything the West can offer. If you want world-class financial services, HK and Singapore have it. If you want state-of-the-art medical services, India, Malaysia, Thailand and Singapore have it. So, you could conveniently do your banking, investment, annual health screening, vaccination, and medical treatment in one of these countries.