Travel budgets have leaks in them, often what you do without thinking cost the most amount of money.
Here is a video showing how I got of the bus when returning from Puerto Plata to Montellano, Dominican Republic. I was about to flag down a Motorcycle taxi and thought to myself.
"I am not doing anything important, why would I pay fo a taxi?"
"Plus, I need to exercise, this is a good way to pay myself to exercise."