There are certain ways in doing it at mass scale. Since you are likely doing it for free you only need to stock certain menu items. If you are buying bulk you can get that for discount and don’t have to pick up everything from restaurants either.(cost savings from one end)
Since you are also targeting specific neighborhoods you probably will points cars to drive in the vicinity of those.
For the cash part, it would be basically make partnership agreements. Like every item you buy on Uber eats say a dollar goes to your company.
Or maybe I am totally off. In which case 🤷♂️I wasn’t gonna win a prize for guessing it right anyway