Not only can you make a decent living by climbing a giant mountain of bat droppings and bagging it up to sell as fertilizer, but you can do the same thing with seagull droppings too. There are entire islands made out of seagull droppings, such as the legendary Chincha Islands of Peru.
So if you're in the market for an easy buck, the first thing you should do is brush up on your Quichua. I very much doubt you'll be climbing any of Peru's magnificent guano mountains (one of which is actually pictured in this article) if you remain as ignorant on this topic as you clearly are. The second thing you should do is invest in some climbing gear, and maybe take some lessons at one of those “rock climbing gyms.” (See if they offer any special advice for guano climbers, because guano is probably a little more slippery than plastic.)
The third thing you should do is to get yourself down there, grab a bucket, and get climbing. There's enough guano for everyone, so dig right in!