How does sourdough (wild yeast) starter differ from location to location?
You're right, sourdough starters are different everywhere, based on what yeasts and bacteria are prevalent in that specific location. Certainly climate and altitude affect the living things that float around, so in turn those variables affect starters. I don't know about the poles or the peaks of Denali or Everest, but you can make a perfectly good starter everywhere else, they will have their own character everywhere you go. Even a distance of a few miles can drastically change the flavor and behavior of your starter. Some places have less or slower to grow natural yeast, so starters can take longer in some places to be ready, but it will happen eventually.

Some places, San Fransisco for instance, are well known for their local starters. You can buy San Fransisco sourdough starter online, but your bread will only taste like San Fransisco Sourdough for a few days or a couple of weeks. If you keep that starter alive, it won't take long before it takes on local yeast and bacteria and creates bread that tastes like the sourdough made by everyone else in the neighborhood. 

The bottom line is that without speaking to another maker of sourdough in your immediate area, you can't really predict how fast your starter will grow, how often it will need to be "fed" or what your bread will taste like. Allow for some variance due to location, but standard recipes and techniques will work just about everywhere. Once you've made a few loaves, you'll get to know your local yeast!