Working out how much drink i need for a small wedding

Hi everyone,


My wedding is next month. We are having a small intimate wedding in a historic venue which will be the ceremony followed by a meal. Reception starts and guests get there hands on a flute of Prosecco at at 3.30ish dinner is at 4.30ish and everyone starts to leave at 7ish.
I’m currently trying to work out how much drink I need to get as that is being supplied by us. This will be for the short reception following the ceremony and the meal. Some people will be driving so there will certainly be people not drinking.
There are 18 adults and a few kids. We have 3 tables sitting 8, 7 & 6.My plan is currently 4 bottles of Prosecco for the reception. 6 bottles of wine (one red and one rose for each table) 24 glass coke bottles, 3 cartons of orange juice, orange squash and some lemonade. Am I missing anything or does this sound reasonable?
Thanks.