The more self-sufficient you can be, the fewer societal resources you will take up, which could then go to someone else in greater need. That's my perspective at least.

But the more self-sufficient you are, the more resources of yourself you need to supply yourself. So you can provide less societal resources. If you do not need to provide clothes for yourself, you have more time caring for elderly, etc.

As another view, the total resources need does not directly change by changing who does what. The advantages of helping each other are in the OP. At some point however, I would think, the overhead of organization grows so large that it may not be worth it anymore. Just think of the amount of work put into "useless" administration in many countries. But in a 30 person village, this is probably negligible.

Edit: Thanks for helping other people on the feet!

Good point, and it sounds like you're doing good work out there

How would one get in touch with such an organization should they find themselves off their feet unexpectedly?

Not having any issues right now, but I think it might be easier to get an idea now that I have resources like a phone with access to the internet than after finding myself in such a position where who knows if I'll own anything.