I mean, unrealistic to get anything close to all active users donating. Nobody should be expecting to setup an instance an expect tens of thousands of dollars a month.
As an indie dev back in the day, it's a fraction of uses are willing to fork anything at all.
If anything, if you're a whale, go big on your individual donation if you want a large impact.
Either way, you shouldn't need that much money to cover server costs for a mere 16,000 users.
Yes pls