Cleaning your floors stops being a chore when you aren't fighting a cord or hunting for an outlet. A cordless vacuum with an extra battery means you can finish the whole house in one go without stopping to recharge.
November is the best time to buy because prices drop across major retailers. You should compare at least three different models to see which offers the best suction and battery life for your specific square footage.
Remember that the 0% intro APR is a deadline, not free money. If you have any balance left after 15 months, the lender will start charging interest on that remaining amount.