That's a lot!!!
My family is very spread out, and because it's always been hardest for my family to travel (only ones with kids, DH with an inflexible work schedule, etc.) I'm often the one hosting - the main meal and guests for many days surrounding it. For the days leading up to the holiday meal, I stick with only 1 "served" meal a day -- dinner. I try to plan things I can do in advance too.
Breakfast: I make sure I have a few popular cereals, and stock up on English muffins, bagels, butter, cream cheese, yogurt, and fruit. I tell people in advance that I won't be serving a breakfast, show them where things are, make sure the toaster is out on the counter, and tell them to serve themselves whenever they wake up/get hungry.
Lunch: Occasionally I'll make a big batch of chicken salad (I like this recipe and it tastes better a day or two after it's made anyways:
https://www.thekitchn.com/recipe-yog...e-kitchn-28363) -- but you can buy delicious chicken salad at the store too! and I stock up on lunch meat, sandwich bread, crackers/chips, etc. Around lunch time I'll often pull food out and set out a stack of plates, but then invite everyone to just come serve themselves. I'll also cut up a bunch of vegetables in advance to throw out for snacking (again, this is an easy thing to buy instead of do yourself, though!). After the first couple days, if we have leftovers from prior meals, I'll often pull out and warm those up as well.
Dinner: Here's a few meals I've used in the past. They're things that are either easy to make in advance, or something fairly simple that can be thrown in a slow cooker in the morning:
*Lasagna - super easy to pre-make and freeze, also super easy to buy from the store and skip the making it step! If you don't want to use store-bought but need easier, Baked Ziti is way easier to make and also freezes great:
https://www.tasteofhome.com/recipes/easy-ziti-bake/ (you can easily add meat to the sauce if you prefer)
*Enchiladas - Make a couple pans and freeze. I'll just serve it with beans (in this case usually just refried ones from a can!) and rice, tortilla chips and salsa, and maybe guac if I'm feeling fancy. (For someone who doesn't like cooking, this recipe is super easy, quicker than most, and everyone always loves it:
https://everydayannie.com/2007/11/19/benchiladas/)
*Crockpot Taco Soup -
https://www.ayearofslowcooking.com/2...ot-recipe.html So easy, super filling, can be a meal in and of itself. I'll often also have cut up avocado, but it's not essential. My kids love it when I have Fritos or Tortilla chips, but also not essential!
*Spaghetti and Meatballs - meatballs can be store bought, or made in advance and frozen. Sauce also can either be store bought or pre-made and frozen. The day you're going to serve it, pop the meatballs and sauce together in a slow cooker several hours before dinner to heat through. Then you just need to make pasta and serve. I usually do a salad as well, and maybe some bread -- again, save time by buying premade salad mixes or salad can be made in advance.
*Salsa Chicken and Black Bean Soup -
https://www.ayearofslowcooking.com/2...bean-soup.html Another one like the Taco Soup that's easy to do in advance, make in large quantities, etc.
*Crockpot Tuscan Pork and Beans -
https://thewanderlustkitchen.com/cro...ork-and-beans/
*Chicken and Wild Rice Stew - this recipe was a huge hit with my guests a few weeks ago.....I had a bunch and literally served it to them for dinner then 3 straight days of lunches and no one complained! Just serve with bread!
*Burgers - can easily pre-make, or can buy them, serve with store-bought potato salad/macaroni salad, baked beans, salad
*Chicken on the grill (if you live somewhere you're still grilling!) - you can marinate it in advance (even well in advance, just freeze it in the marinade and let it thaw in the fridge a day before cooking)
*Order pizza!