This amused me so much, I had to register and stop lurking: I've literally just started a blog about my upcoming RTW trip. Hopefully I'll be off help, even if I haven't set off yet. I'm leaving in August. I'm travelling for three years, one in South East Asia, one in Australia and one in New Zealand.
Where were you planning on going?
I think either South East Asia or South America would be ideal for a Mustachian traveller.
My budget for SE Asia is $40 a day, and that's on the high end (I like to overbudget for things, rather than getting caught out). Apparently you can have a very good time on $25 a day. I'm going to be staying in hostels (sometimes dorms, sometimes private rooms), drinking moderately and focusing on the sights that are free or cheap to get into.
I've only travelled to Ecuador for four weeks last year, but that was also incredibly cheap, and I've heard most of the South American (and some Central American) countries are also good value for money.
Depending on how old you are and what nationality, you could look into applying for a Working Holiday Visa. I'm doing that so I can stay in both Australia and New Zealand for a year. Hopefully I'll be able to work enough to cover all my expenses. Both of these countries are expensive compared to SE Asia. I think you can do a Working Holidays in Canada as well.