We’re doing a brunch too and I wish we could at least DIY some of it! Our venue only accepts food through them. Like others have said you DEFINITELY need a few people to help, especially day of. I’ve hosted events for 50-100 doing similar DIY catering and not for a wedding, and I think you need at least 2-3 for the amount of people and types of food. You want to be able to enjoy your wedding stress free and I think its possible to find some folks for this (you could see if any students at a local high school or community college in the food service program would be willing to do it for a reasonable amount, or if you have anyone who is good at cooking and maybe that would be their wedding gift to help out with food)
I think brunch foods lend themselves verrry nicely to prep ahead foods.
-You can make mini quiches in muffin tins and freeze ahead (or refridgerate if closer to date) which will allow them to cook quicker when you serve them.
– Chilaquile casserole! You could make multiple trays and then set them out with toppings like sour cream
-our family LOVES a dish called chili egg puff (you can google recipe) its really easy to make in large batches, keeps well in fridge, and you could also serve with chilaquiles as a more brunch than breakfast dish. You could also go a less spicy route and serve it with hawaiin rolls and cheese
– We’re going to have our cocktail hour beforehand to allow people to arrive, you could do this and make overnight oats and have a toppings bar of berries
– Depending on your setup/what you end up with labor, you could get a few electric skillets and have some ‘hot’ stations like bacon and pancakes
– Alternately a ‘build your own breakfast sandwich station’ if you could get your hands on one of those pass through toaster ovens, you could lay out english muffins and breakfast sausage and cheese etc and people can assemble and send them through
– PP mentioned worry about sausage keeping, you can look for chicken or turkey breakfast sausage which often come precooked
– Your chicken and waffles idea I think would be great and easy make ahead if you did them as sliders, cut the waffles into quarters ahead of time and use precooked chicken nuggets, then make little sandwiches with a toothpick and throw them in the oven
Sorry if thats a lot! I love brunch ideas! Also if you have a Costco near you maybe make a run just with your brunch in mind, I know they have croissants, muffins and shrimp cocktail