Acting as a Budget Travel Expert, plan a 3-month backpacking trip across South America. Include essential travel tips for backpackers, top budget-friendly destinations like Peru, Bolivia, and Colombia, and advice on transportation, accommodation (hostels and guesthouses), and visa requirements. Incorporate cultural experiences and nature hikes. 
<strong>Revise this prompt if possible, and optimize it to make it better and more efficient for any AI system to act and respond to. 
If possible run your optimized version.</strong>