If it were me and I were looking at your option, first thing I would do is to call the place and ask them about being able to brew 100 gallons.
Depending on how many people they work with at one time, they may only have two or three burners!
Seems like a good place to start.
THEN.... Are you going to do 800 bottles, 20 corny kegs or what?
I would hate to think of 800 bottles to be filled!
One style of beer or a few?
Let's see if I keep this updated!
Black Butte clone
Up next.. Firestone Union Jack clone