Seems like this could be an interesting niche for a fediverse project. The only option that seems to think in that direction that I could find is Epicyon.
Seems like an ideal application of the federated technology. Start small as a neighbourhood sharing/bartering network and over time it can expand easily to cover an entire city or such.
I really think this would/could be a pretty cool addition to the fediverse, would love to see something with a trading section, mutual aid section for both people requesting support and groups organizing support and some kind of employment/gig section. That’s just my 2 cents.