Greece is best when it's quiet. Aim for late May or early September when the Aegean is warm enough for a swim but the ruins in Athens aren't a total furnace. You get the white-washed views and the ancient history without the summer cruise ship crowds clogging every alleyway.
A solid two-week run through the islands and the mainland usually costs around $4,500. Instead of draining your savings in one go, we can break that down into manageable pieces over time. It's about getting to the islands sooner without the immediate sting to your bank account.
This strategy works if you are disciplined about the timeline. The 0% intro APR for 15 months on purchases and balance transfers is a hard deadline, not a gift. If you still have a balance when those 15 months end, the standard interest rate will apply to the remaining amount, which will quickly add to the cost of your trip.