Peru runs on a strange calendar. The Andean dry season, May through September, is when the skies over Cusco and the Sacred Valley finally clear, the Inca Trail opens properly, and condors ride the thermals above Colca Canyon. You trade that for busier trails, colder nights at altitude, and prices that climb the closer you get to July. It's still the right call for most first-timers — Machu Picchu in March rain is a soggy gamble.
A two-week trip from the US typically lands around $720 once you count flights, a mid-range hostel or guesthouse, the Cusco tourist ticket, and enough meals to not live on instant ramen. Below, the playbook for stretching that across a year and a half of breathing room.
The honest version: 0% intro APR is a deadline, not a discount. If $720 is still on the balance after month 15, the remaining amount starts collecting interest at the regular purchase APR, which can easily be 20% or higher. Pay it off in full before the window closes, or front-load extra payments in the final months.