It is easy to do mutual credit or any accounting inside one organisation running one software instance on one server. Accounting between organisations on different software on different servers is much harder though.
I've learned in the last decade just how hard it is to work outside the money system. Its like trying to work outside of Facebook - there just isn't anything else equivalent, and all your connections are there. If you drop out of the money system you lose all your trading partners and may struggle to build a new network in a field which is narrower and has less powerful tools.
Selling tokens is now an accepted way to raise investment capital for IT projects, at least for speculative blockchain ventures. Tokens are not like shares an a company; they do not pay dividends or confer voting rights. Sometimes they can be used to buy the product or service, on the off-chance the company ever gets it to market. But sometimes it is neither of those, and issuers come up with creative ways to assure investors that success of the venture will somehow translate to demand for the tokens.
Over the years I've come across a few proposals that any person or entity should able to issue their own currency, and I've always struggled about what that would mean and how it would work. This is relevant for recursive currency systems like the Credit Commons in which theoretically any member could create a currency as part of a larger monetary ecosystem. Recently I've been thinking these through and I think the benefits are outweighed by the drawbacks.
This document outlines a range of technical options and estimated costs of each.
Technical projects by nature are notoriously hard to cost because by nature each one is breaking new ground and risks are hard to calculate. For projects to work to a predetermined budget, the technical risk must be priced in from the beginning and this takes the form of high salaries for developers to meet specific technical goals. There are many mIf the goals are softer, if some corners can be cut, if some features are considered optional - i.e. included only if the essential things are completed.
Most Greeks will tell you that the Exarchiea quarter of Athens is a dangerous and dismal place, in desperate need of gentrification - because the establishment media tells them so.