The cheapest of the cheap foods is always an option, and easy to make
You can live stream directly to Youtube using the same software that you use for Twitch. Discoverability on each platform is similar, but Twitch is easier to monetize.
Cheap, healthy, and easy. You can't beat a breakfast that hits all three criteria.
For a cheap dinner, combine rice, lentils, and sausage into a frying pan for a quick, tasty dish.
Use potatos instead of beef to fill your taco for a delicious meal that costs far less.