I’ve been thinking about some similar use cases recently and came to the conclusion that it’s ultimately about packaging. All the functionalities that are needed are fairly readily available (other replies here have aome good suggestions in Nextcloud and self-hosted Odoo), but the real challenge is to make it easily deployable into and accessible for the community.
My thinking was specifically for the idea of easily connecting and organising building tenants. I want to get to the point where one (or a few) tenants can get together, set up a single boxin a flat in the building, and distribute QR codes to the other tenants that will allow them to access some kind of virtual building community hub. If you’re reliant on a lot of technical know-how to set up or maintain this, that’s going to severely limit its usefulness.













Money laundering. Not even joking. Large denominations of cash is one of the more important ways of transferring value across borders for laundering purposes, which is why the largest number of bills in the most significant international currencies (USD and EUR, primarily) are in denominations mich larger than their day to day use value should suggest.