Dry beans are even cheaper than canned beans. Just soak em overnight, put them in fresh batch of water, and then cook them for like 20 mins. Beluga lentils are smaller and cook faster than regular beans. You need to add salt to the water before you cook them. You can add fat into the beans to make them more delicious. If you have a tough set of customers, a 1/4 teaspoon of MSG makes beans really popular.
Soaking them and tossing the water makes them less windy according to research-based evidence.