To make financial plans for vacationing abroad, start by setting a budget for your trip. Determine how much money you are willing to spend on accommodations, transportation, meals, and activities. Research the cost of living in your destination country to get a better understanding of the expenses you may incur. Consider saving money beforehand by cutting unnecessary expenses and creating a dedicated travel fund. Lastly, consider using tools like travel rewards credit cards or prepaid travel cards to manage your expenses while abroad.