Are you sure you can make 4-5 differente bread pudding recipes to feed a 100....??
Remembering it will be cooked in baine marie.
Also thats a lot of bread to soak, cut etc....
Thats a lot of eggs
Thats a lot of product in general
Are you gonna make big trays or ramekins for single servings of bread pudding?
I personally find trays or rounds of bread pudding really ugly and unnappealing after the first few cuts.
I think making 100 ramekins or single servings of bread pudding already great, now making 4-5 different recipes, remembering this will total out to about 400-500 servings considering im sure most guests will want to try at least 1 serving of each.
That to me just sounds like a lot of labor for something so simple that doesnt need to be made 4-5 times differently.
I rather focus on making 1 good bad a** bread pudding, maybe making around 250 servings so everyone can have seconds and some people have thirds, then to try to go for 400-500 servings using different recipes.
Unless they are all going to be perfect and all at equal levels, thats just setting yourself up to kinda fail and cause critism among the dishes you made. I rather avoid comparison doing something multiple ways and just make it once perfectly.