I mean they’re harvesting food I bet sales can cover ladders and fuel and whatnot. If you’re short on workers ask literally any other non-profit if they wouldn’t like half a ton of apples to make pie with for one of their projects, you’ll get your workers. Have a general “pluck two get one” policy provided they’re not selling the stuff, no other questions asked.

Basically all that’s necessary is to have someone responsible for organising things, the economics are trivial as we’re literally talking about distributing stuff for free.