A good camera setup should last you five to seven years, not two vacations. Most people buy an entry-level body with a cheap kit lens, realize their phone takes better night shots, and end up buying twice. Skip that cycle. Camera companies update bodies every few years, which means last year's mid-tier model has virtually identical sensor tech to the newest release at a steep discount.
A modern mirrorless body paired with a fast, versatile prime lens runs around $1400. That gives you clean low-light shots and real depth of field in a compact package you will actually carry. Here is how to buy it without letting interest eat away at the savings.
Keep in mind that a 0% intro APR is a countdown, not free money. If you still owe money when the 15 months wrap up, regular interest kicks in immediately on whatever balance remains, which undoes the savings you found by buying refurbished.