Belize gives you two trips in one: quiet rainforest lodges in San Ignacio and world-class snorkeling off Caye Caulker. Go in May or late November during the shoulder season. The weather stays warm, crowds thin out, and hotel rates drop significantly across the country.
A solid week for two runs about $2,600 including flights, stays, and tours. Instead of draining your savings all at once, you can spread that cost into manageable monthly payments using a 0% APR intro window.
Remember, a 0% APR window is a deadline, not free money. If you still have a balance on your Citi Simplicity® Credit Card after 18 months, regular interest rates kick in on whatever is left, making your trip much more expensive.