A new tile floor and a vanity you actually like changes the room you use every morning. Demolition, plumbing rough-in, tile setting, grouting, and vanity install typically run one to two weeks of work, so the disruption is real but bounded. Booking contractors in late winter, when their schedules are loosest, often gets you a better price and a wider choice of available crews.
The trick with a remodel is that the labor and materials cost real money up front, and most homeowners don't have that sitting in checking. Spreading the bill over a set window at no interest is the cleanest way to pay without dipping into your emergency fund or taking a personal loan. That's what a 0% purchase card is built for, as long as you treat the promo window like a deadline, not a gift.
The 0% intro window is a deadline, not free money. If a balance is still sitting on the card at month 18, the standard APR kicks in on whatever's left, and that rate is applied retroactively to the original purchase in some cases. Pay it off on schedule, and the remodel costs exactly what you planned. Miss the window, and the math stops working fast.