There are so many different things you can do. You can go to Smart & FInal in Fullerton and buy hamburger patties and buns, very reasonably priced--the 1/4 pounders are very good--we sprinkle them w/a little onion salt. You could also do some hot dogs and a pkg. of veggie patties for the few who don't want the beef. You could make a huge batch of potato salad, and ask some of your closer friends and relatives to also bring some salads (for you alone to make enough potato salad for 80 people, you'd need at least 20 lbs. of potatoes, which is a lot to make out of your home, and that's assuming you have at least one other salad), and then just put a few salads out at a time, and when they get low, put a few more out. Costco makes a big fruit bowl (not the tray) and you'd need about 5 of those. Chips and dips, of course. Or you can do a taco cart. My personal favorite. Those are phenomenal. If you haven't experienced one yet, they come to your house, set up their grill and cook your meats there. Then when people are ready to eat, they go to the grill and order the tacos they want and it takes them seconds to warm the tortillas, fill them and move on to the next person. I had the taco cart come out, and ordered rice and beans from Blue Agave in Yorba Linda--I paid $20 for the rice and same for the beans, fed 50 people and had enough left to feed my family and friends for an entire week. I also ordered their chips and salsa because they're so delicious. I made a mexican-type salad with romaine lettuce, diced red, yellow and orange bell peppers, red onion, jicama, and corn, then IMMEDIATELY before serving, tossed only one bowlful w/El Torito's green ceasar dressing. I think it's cilantro ceasar or something like that. But it's the only El Torito dressing at the grocery store. The important thing is to do that in batches, or the salad gets limp and gross, especially when you have a crowd like that, everyone doesn't always eat at the same time and it gets really yuck. So, one large bowl at a time. If you're interested in the taco cart and don't know of one, email me and I'll find the card of the one I used. They were very professional and everyone raved about the tacos! Oh--you might want to rent a chafer for the rice and beans---under $20 from a party rental place. Keeps them hot and your buffet table looks nice. You could also do spiral sliced ham from Costco, Honey Baked or Stefano's, then do all the side dishes. (Costco is cheapest.) But if it were me, with the gorgeous weather, I'd go for the barbeque or the taco cart. Good luck, plan ahead, and do everything in advance, so you can enjoy your party!!