October is the quiet sweet spot for Switzerland. The summer crowds are gone, the foliage is turning against the Alps, and high-altitude hiking trails stay open before the snow sets in. You get the sweeping views without the peak-season prices or massive tour groups.
A realistic budget for two weeks comes out to about $4500. Instead of paying that all at once, you can spread the cost over time. With the Citi Simplicity® Credit Card, you get 0% for 18 months on purchases and balance transfers from date of account opening. That breaks down to $250.00 per month to clear the balance before interest starts.
A 0% interest window is a deadline, not free money. If you still carry a balance on your Citi Simplicity® Credit Card after the 18 months end, regular interest kicks in on whatever is left. Stick to the $250.00 monthly payoff plan to finish on time.