Hi, folks

Can you help with a suggestion?

On October 16, my wife and I will be renewing our marriage vows on the
occasion of our 10th anniversary. The renewal will be held in the
church where were married, with about 25 guests in attendance.
Afterward, we will host a reception in the church's parish house, and
I would like to supply champagne for the occasion. Is there a decent
champagne that retains for about $20 a bottle? As a rule of thumb,
how many bottles should I buy for this gathering of 25-30 people?

If it makes a difference, we live in the Maryland suburbs of DC, where
the county operates the liquor stores. And we can't order alcoholic
beverages via mail.

Thanks,
Leo