Spring in Amsterdam means the tulips are hitting their stride, the crowds are manageable before summer hits, and you can actually get into the Van Gogh Museum without waiting half the day. Booking about three months ahead lets you lock in decent rates on flights and hotels before the warm-weather rush drives prices up. You'll spend your days walking the canals, ducking into brown cafes for a local beer, and taking your time with the Dutch masters.
When you are ready to book that $2500 typical cost, you might look at ways to spread out the payments so you aren't wiping out your checking account all at once. Using a credit card with a promotional rate can help you break the total into steady chunks over time. Just keep your eye on the actual math so you know what you are signing up for before you click confirm.
That 0% intro window is a hard deadline, not free money, and if you still have a balance left when the 18 months are up, you'll start getting hit with standard interest on whatever is left over.