I live in Port Harcourt, Nigeria so transport here isn't really expensive. I'd say I spend about 30% of what I earn monthly on transportation and that's because where I live is a bit far from all the places I go to to make money.

As for how often I use a bike, I'd say I use it just about every single day I go out. It's the most convenient means of transport for getting to places that cabs and buses don't usually get to.