Acting as a Winter Sports Travel Expert, design a 10-day ski and snowboard itinerary for a group of friends visiting top resorts in Colorado, such as Aspen, Vail, and Breckenridge. Provide recommendations on lift passes, equipment rental, and après-ski activities. Include tips on finding affordable accommodations and alternative activities for non-skiers. 
<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>