You want the house to smell like cinnamon and pine, with enough good bourbon on hand that people actually stay and chat. December hits fast, and trying to pull off a holiday party for the block while buying gifts and groceries all at once is a quick way to stress yourself out.
Spirits and mixers in bulk are where most of your $700 budget goes, so lead-time is your real lever here. Knocking out the logistics early means you can actually enjoy your own party instead of running to the store for ice while the doorbell is ringing.
That 18-month window is a deadline, not free money, so make sure the $700 is paid off before it ends or standard interest rates will hit whatever is left.