I spent two years driving from Alaska to Argentina, feelancing website design and code along the way.

For the entire trip, my monthly expenses were less than they were in the 2 years prior just going to work every day. Yes, that includes gas for 40,000mi. I lived in my Jeep/tent the entire way.

I plan on doing something similar (but bigger) again, and I'll be building a more livable vehicle with a sink, stove, fridge, better sleeping, etc. etc.

http://theroadchoseme.com/the-price-of-adventure