Turning 30 deserves a proper trip with your favorite people, but wrangling a dozen friends for a milestone birthday weekend usually turns into a logistical mess. Four months out is the sweet spot for locking in group house rentals before the best spots get snapped up or prices jump.
Big group trips mean fronting cash for big deposits long before anyone actually pays you back. If you are eyeing the Citi Simplicity® Credit Card, the terms give you 0% for 18 months on purchases and balance transfers from date of account opening to spread out the upfront hit.
That 0% window is a deadline, not free money, so make sure the balance is totally gone by the end of the 18 months or standard interest kicks in on what is left.