You want a private bartender for an evening event, which usually runs about $600 in the US. Weekdays are your best friend here. Bartenders are cheaper and much easier to book when everyone else is fighting over Saturday night.
Deadlines rule the night when you are hosting. You need to nail down your guest count and buy your liquor before you even think about the schedule. Let us look at how to time it all out.
That 0% intro window is a strict deadline, not free money. If you still have a balance left when those 18 months are up, the standard interest rate kicks in on whatever you owe.