So my dad wanted to go buy all the alcohol and do everything himself, but we just found a drink catering service for $20 bucks per over 21 guest (anyone under is free), which includes 3 types of wine, 4 beers, champagne for toast, and hard liquor--no limit, plus all the trimmings ie limes, cherries, mixers etc. Is this a good deal? I have no clue about pricing of these things.