Picture yourself walking through the steep, colorful alleys of Porto with a glass of port wine in hand, then heading down the coast to the sandy beaches of the Algarve. May and September are the sweet spots for this trip because the weather is warm, the crowds are manageable, and you get the best feel for local life without melting in the peak summer heat.
A typical trip runs about $3200 for flights, stays, and daily expenses when you book four months ahead. Spreading that cost out over time makes it much easier to handle, especially if you use a specific timeline to break the total down into manageable chunks.
That 0% period is a hard deadline, not free money, so if you still have a balance left when the 18 months are up, standard interest kicks in on what is left.