Your idea would have been great 4 years ago. A Hive cafe has much more value than a hive race car or a hive movie. Sadly back then we thought we were invincible and we acted as if the DHF had real money and not just first dibs on liquidity.
I had another idea 3 or 4 years ago, which was to have fiction writers pen short stories that could be collected into an Anthology book, "Hive Presents... I dunno, short stories, or whatever."
Then we could self publish those books, and use them as a way to promote Hives authors, and the chain, and also earn some money (if anyone bought them)
Publishing books like that would not be a ridiculous amount of money, and we have plenty of authors and writers of fiction here (myself included)
But, this is what I mean, there are tons of ideas to generate money, and advertise ourselves at the same time, without having to run major (and expensive) marketing campaigns.
The book idea for example would bring in readers, who may join to follow their favourite authors of the anthology.
We don't need the DHF for publishing on Amazon for example, if you think it has value go for it, you will do much more than many projects funded in the past have ever done
There are some costs, they are minimal for the most part.
ISBNs are required, I think 10 cost about €250 - €500 and one is needed for each edition of the books release.
Also, an editor would be needed to check over all the stories, and a cover art designer would be needed.
There are some other associated costs involved even with self publishing. I wouldn't have the money to do it by myself, especially if it is supposed to be a combined effort for the benefit of Hive.
It would probably be about €1000 - €2000 to do it, which could potentially be paid by the authors of the book by dividing the cost.
The problem I faced back when I was trying to get this done, was gaining attention from people and gathering up authors who were interested in teaming up. But, it's still a good idea and could still happen.
In fact, I might put the word out again, and see if we can do it. I have a few people I could ask now, who I think would be interested