How do you feed 20 guests on a budget

Have an easy-to-grab appetizer on hand that gives people something to do and a place to gather. Chicken Spaghetti
Use these like this at a Taco Bar.Crispy carnitas tacos served in a metal dish with white bowls of toppings on the side.
These carnitas made in a slow cooker are one of my all-time favorite cheap dinners for a big group. Sliders with ham and cheese in a baking dish and chicken and cheese tacos made in a slow cooker. French dip sandwiches made in a slow cooker, on a white plate. Cheddar and Bacon Potato Soup is great for big groups. Southwest Bacon and Chicken Wrap is hard to dislike.

Fake-out lasagna is cheap, can be made ahead of time, and can feed a lot of people. Casserole with chicken Parmesan
Fake out lasagna is a cheap meal for large groups. Smash Burgers are just as good as any fast food burger when grilled right. BBQ Chicken Sliders
Slow Cooker Parmesan Sliders
Shredded balsamic beef in a tortilla soup was eaten by people of all ages, from 4 to 42. Mini fruit pizzas, pulled pork and cookies are also good for big groups. Slow cooker pork shoulder is smoked all day and makes a TON of tasty pulled pork BBQ sandwiches.