Some coordination and a plan would be good here. While I know you can't store potatoes indefinitely, milk on the other hand is a different matter.
You can make cheese and store it for years. I know it's not the same as selling the fresh products right away and cashflow is slow but still. Maturated cheese is more expensive than the milk itself and can be sold later.

This is just an idea and I know lack of income can put the lock on your business. I also know this pandemic won't go away by itself and as far as people are concerned, I don't see the vast majority to understand what it's needed to be done. So we'd better start working out plans and learn how to survive, how to sell or transform these products.

In any case, posts like this are good as are raising awareness and we can all do our part.