I think presenting costs as a rough “per user/player” calculation might be more effective than presenting just the total cost. That way people are reminded of their own personal resource usage, which seems like a more manageable/tangible number, and it can be accompanied by the broader stats since of course not everyone voluntarily pays (and some people pay more than their fair share).
Back of the napkin math, but if the servers cost $0.25/month/player and the owner would like to make $5,000/month (very conservative but sure, why not) and there is a 20% "future emergency fund" in place, when the game has 5,000 players then each player would need to contribute on average $1.50/month, or $18/year.
I would want, in exchange for that, that the game be fairly stable, that there be things to do such as Quests or Tasks, and that I could enjoy the game for maybe an hour a week, maybe 2 if I'm in a rut.
Exactly, and I think that sort of request for contribution is much more likely to make people feel inclined to contribute than some abstract goal of getting $10k/mo in donations or whatever.