Switzerland in late winter is quiet and sharp. You get the snow-capped peaks and still lakes without the summer crowds. It is expensive, but the trains run on time and the views are real. You are there for the mountain air and the blue water, not to worry about a single massive bill.
A typical trip runs about $4500. You do not have to drop that all at once. Using the right card can help you split that cost into monthly chunks while you prepare for the mountains.
The 0% intro APR for 15 months on purchases and balance transfers is a deadline, not a permanent discount. If you still have a balance when those 15 months are up, you will start paying the standard interest rate on the remaining amount.