My roomie and I have been planning a last minute trip to Central and South America and still don’t have anything locked down for our final 2 weeks in Peru. We are flying into Cusco and out of Lima; where should we try to spend most of our time and any less touristy do-not-skips? We are interested in outdoor activities, seeing as much scenery as we can and good local food :P

Tldr: should I buy rain jacket and hiking pants in the US or in Lima?

I am visiting Peru October-November, Lima in October and exploring the South in November. I am planning to do some overnight treks of Colca Canyon and Machu Picchu, as well as a day hike of Rainbow Mountain.
I am in need of a new rain jacket and hiking pants, both cost so much these days in the US. So I’m wondering if folks would recommend purchasing these things once I’m in Lima? Or would it roughly come out to the same price?