if it seems like the route we do want to go, i do think a kinni.es masto instance would be doable. but i don't want to make that decision right away, bc it requires an amount of buy-in (both in terms of time investment and money investment)
i would not want to set it up and then have it be abandoned in a week, y'know
a 5 to 50 user server would not be terribly expensive, but any bigger than that and it becomes more serious that it's not an impulse decision
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plus you have to figure out how to handle storage – are all the posts and images being saved on the server (this space will eventually run out, and would mean old pictures get cleared out every once in a while), or are you also paying for cloud storage
