I bought a Bunn VP-17 commercial coffee maker over a decade ago and use that. It makes a fresh pot in 3 minutes and it can make 4 gallons of coffee an hour.
Edit: I just looked at the prices these go for currently and I definitely did not pay that much for one. At the time it was around $200 instead of the $400+ they sell for today.
Edit: I just looked at the prices these go for currently and I definitely did not pay that much for one. At the time it was around $200 instead of the $400+ they sell for today.