Edinburgh is best seen in late spring, just before the August festival crowds drive prices through the roof. You get mild weather for walking the Royal Mile and exploring the dark, narrow alleys known as closes without fighting for every inch of sidewalk.
A trip like this usually runs about $2600. To manage that cost, you can use the Citi Simplicity® Credit Card, which offers 0% for 18 months on purchases and balance transfers from date of account opening. This lets you spread the cost over a longer period instead of paying it all at once.
Remember that the 0% period is a deadline, not free money. If you have any balance left after the 18 months are up, the bank will charge you interest on the remaining amount.