Where do you buy large quantities of seeds at affordable prices?
40 years ago we did micro greens in quart jars. The only way we could afford seeds was grow plants and harvest our own seeds. 1 melon has about 1000 seeds, 1 ear of corn about 800 seeds, 1 okra pod about 700 seeds, 1 pepper about 800 seeds, 1 bean plant about 100 seeds.
Put 1 spoon of seeds in each jar, beans, corn, peas, peppers, melons, tomatoes, broccoli, cabbage, etc.
We had 20 quart jars on our kitchen counter top. Put seeds in each jar. Pour warm water in each jar then drain away the water. Keep a cloth over the jar opening so water pours out and seeds stay in. Rinse jars 5 times a day with warm water. Keep seeds warm and wet in a sunny location. When jars become full of green plants you have a salad, sandwich, topping, breakfast lunch or dinner.
Greens have ROOTs also. No soil to deal with. Pour sprouts from jars on your breakfast lunch or dinner then put another spoon of seeds in the jar. Some seeds grow greens sooner than others.
Nice thing about sprouts you can have a sandwich covered with broccoli sprouts out of season. Any seeds in the cabbage family sprouts extremely fast.